Phase 2 trial
TREASURE NCT04462276
ForES-SCLC, ≥stable disease after chemo-IO induction; unselected
6.7 vs 13.4 mo
HR 1.55 (95% CI 0.90-2.69), P=.34; TRT arm worse, ns
TL;DRmOS 6.7 vs 13.4mo (HR 1.55, ns) adding consolidative TRT to atezo maintenance; halted early for SAEs 61% vs 18%.
The harm, not the null OS, is the RT read: SAEs 61% vs 18%, fatal AEs 19% vs 3%, driven by post-TRT lymphocyte depletion and low baseline DLCO in the fatal cases. 30Gy/10fx consolidative TRT on atezo maintenance is net harmful in unselected ES-SCLC; any future use needs lung-function gating.
6 details 1 trial watching
Phase 2 open-label RCT (AIO-TRK-0320), 1:1, 20 sites in Germany/Austria. Planned 104 pts; halted early by the SMC after 68 randomized (34/arm) for excess fatal SAEs in the TRT arm. Recruited 2020-2022, last follow-up Sept 2024, post-hoc survival update April 2026.
ES-SCLC with at least stable disease after induction carboplatin-etoposide-atezolizumab. Baseline well balanced between arms and between pts with vs without SAEs. Unselected for lung function.
Consolidative TRT 30 Gy in 10 fractions added to atezolizumab maintenance (arm A) vs atezolizumab maintenance alone (arm B).
Primary: overall survival. Secondary included PFS and safety.
Primary OS not met: the TRT arm was numerically worse with no PFS difference and sharply higher serious and fatal toxicity (see table).
| Endpoint | +TRT (arm A) | Atezo alone (arm B) | Effect |
|---|---|---|---|
| mOS | 6.7 mo (5.1-9.0) | 13.4 mo (10.7-17.5) | HR 1.55 (0.90-2.69), P=.34 |
| mPFS | 2.4 mo (1.3-3.9) | 2.6 mo (1.2-3.9) | HR 0.92 (0.54-1.55), P=.85 |
| SAEs | 61.3% | 18.2% | P<.001 |
| Fatal AEs | 19.4% | 3.0% | P=.04 |
SAEs dominated by infection and respiratory disorders, linked to radiation-induced lymphocyte depletion; fatal-AE pts in arm A had lower baseline DLCO. No other risk factors identified.
CREST (pre-immunotherapy) showed a modest OS benefit from thoracic RT after chemo; TREASURE tested that strategy on an IMpower133-style IO-maintenance backbone and found harm, not benefit.
Open-label; small N (68) and early termination leave OS underpowered with a wide CI. Phase 2; efficacy conclusions provisional, though the safety signal is robust.
Randomised harm signal (SAEs 61% vs 18%, fatal 19% vs 3%) argues against adding consolidative TRT to IO maintenance, contesting emerging RT enthusiasm; OS worse but underpowered by early stop.
In unselected ES-SCLC with at least stable disease after chemo-IO induction, this evidence argues against routinely adding consolidative thoracic RT to atezolizumab maintenance; it does not address the good-lung-function subset the authors flag as possibly selectable.
- Which lung-function-selected ES-SCLC pts might tolerate consolidative TRT on IO maintenance not yet Adebrelimab Combined with Chemotherapy and Thoracic Radiotherapy for First-line Treatment of ES-SCLC Phase 3n=524 · primary completion 2029-06 · phase 3 consolidative TRT on adebrelimab IO maintenance
- Whether lower-dose or delayed TRT lessens lymphocyte depletion and infection risk
📚 Sources · 📄 1 paper
Abstract
10-yr SBRT for Prostate Cancer (Meier Nonrandomized Trial)
ForLow- and intermediate-risk localized prostate, no ADT, Gleason ≤7, PSA ≤20
TL;DR10-yr OS 84%, RFS 90% (94% LR, 86% IR); late G3 GU/GI ≤1.5%, no G4-5; 40Gy/5fx SBRT, no ADT, 21 centers
The unfavorable-IR subgroup is the read: 10-yr RFS 77% vs 92% favorable-IR, so SBRT monotherapy without ADT looks adequate for LR/favorable-IR but leaves unfavorable-IR pts short. 40Gy/5fx transfers directly to practice. Late GU G2+ 14% (vs GI 2.1%) is the toxicity to counsel.
9 details 4 trials watching
Investigator-initiated phase 2 nonrandomized single-arm trial, N=310 evaluable across 21 community, regional and academic centers, treated 2008-2010. Median follow-up 9 yr; 10-yr Kaplan-Meier estimates.
172 low-risk (T1b-T2a, Gleason 6, PSA ≤10) and 138 intermediate-risk (Gleason 7 with PSA ≤10, or Gleason 6 with PSA 10-20), central path review. Median age 68; prostate volume up to 100 cc; ADT not allowed.
40 Gy in 5 fractions (8 Gy×5) on a noncoplanar robotic platform with real-time motion management, dose escalated to ~100 Gy EQD2 (α/β=2).
10-yr OS 84% and overall RFS 90%; risk-group and favorable/unfavorable IR breakdown in the results table. Relapse defined as biochemical failure (nadir+2), clinical failure, or salvage/systemic therapy.
| Subgroup | 10-yr RFS |
|---|---|
| Overall | 90% |
| Low-risk | 94% |
| Intermediate-risk | 86% |
| Favorable IR | 92% |
| Unfavorable IR | 77% |
Late G3 GI/GU 1.4% LR, 1.5% IR; no grade 4-5. G2+ GI 2.1% vs GU 14%, the dominant late burden. Physician-reported CTCAE v3.
PACE-B showed SBRT noninferior to conventional EBRT at 5 yr; this extends single-arm SBRT durability to 10 yr, consistent with the cohort's prior 5-yr low-toxicity report.
Single-arm, no randomized comparator; toxicity is physician-reported (CTCAE v3), not patient-reported, so late GU burden may be understated; RFS folds salvage/systemic therapy into the relapse endpoint.
Single-arm nonrandomized phase 2; no comparator arm (PACE-B provides randomized evidence). Mature 10-yr data reassure but design caps the read below confirmatory.
In low- and favorable-intermediate-risk localized prostate (Gleason ≤7, no ADT indication), this supports ultrahypofractionated SBRT as durable at 10 yr; it does not extend to high-risk or node-positive disease, where ADT and nodal coverage remain in play.
- SBRT monotherapy sufficiency for unfavorable intermediate-risk without ADT n=310 · primary completion 2025-12 · randomized SRT +/- ADT, unfavorable intermediate risk
- 10-yr randomized SBRT vs conventional EBRT outcomes n=503 · primary completion 2028-08 · SBRT vs standard RT: local control + bDFSrecruiting PRO-BOOST-LC: Whole-Gland Boost Strategies Versus SBRT Monotherapy in PSMA-Staged Localized and Locally Advanced Prostate Cancer Phase 2/3n=1200 · primary completion 2033-12 · randomized SBRT monotherapy vs EBRT-backbone boostrecruiting Testing Shorter Duration Radiation Therapy Versus the Usual Radiation Therapy in Patients With High Risk Prostate Cancer Phase 3n=1209 · primary completion 2036-03 · phase 3 SBRT 5fx vs usual 20-45fx EBRT
📚 Sources · 📄 1 paper
ARTO NCT03449719
ForOligomet CRPC, ≤3 mets, no prior systemic mCRPC therapy, on abiraterone
TL;DRmOS NR vs 50mo, HR 0.55 (0.33-0.92, p=0.021) adding SBRT to all mets to abi+ADT in oligomet CRPC (unplanned OS analysis).
Ablative dose is the transferable read: BED ≥100 Gy in 1-5 fractions to ALL oligomet sites, and MDT added no excess grade 3-4 toxicity (the only treatment-related death was in the control arm). Extends the oligomet-MDT OS signal from hormone-sensitive disease into CRPC on an abiraterone backbone, informing whether to irradiate all sites when starting an ARSI.
Also covered Jun 12
9 details 4 trials watching
Phase 2, open-label, randomised 1:1, N=157, 16 Italian academic/community centres; stratified by centre, ECOG PS, and number of metastases. Median follow-up 53 mo (IQR 43-60). This OS read is an unplanned long-term analysis.
Prostate adenocarcinoma with metastatic castrate-resistant disease, ≤3 metastatic sites, and no prior systemic therapy for mCRPC. Control n=82, experimental n=75.
Both arms received ADT plus oral abiraterone acetate 1000 mg daily. The experimental arm added SBRT.
SBRT to all sites of metastatic disease, 1-5 fractions, biologically effective dose ≥100 Gy (ablative).
Primary: 6-month biochemical response (PSA drop ≥50%), previously met and reported. This paper reports an unplanned overall survival analysis at long-term follow-up.
OS median NR (95% CI 55-NR) experimental vs 50 mo (36-NR) control, HR 0.55 (0.33-0.92), p=0.021.
G3-4 infectious complications 5 (control) vs 0 (experimental); cardiovascular disorders 3 vs 3. One treatment-related death (myocardial failure) in the control arm. No excess toxicity from MDT.
Prior oligomet-MDT RCTs (STOMP, ORIOLE) enrolled castration-sensitive disease; ARTO extends the metastasis-directed RT signal into the CRPC setting on an ARSI backbone.
Unplanned OS analysis with post-hoc power recalculation; the trial was powered for 6-month biochemical response, not survival. Open-label, small N (157), phase 2.
Unplanned OS analysis (trial powered for 6-mo biochemical response, not survival); phase 2, N=157, open-label. Positive but hypothesis-generating pending a survival-powered phase 3.
In oligometastatic CRPC (≤3 sites, no prior systemic mCRPC therapy) starting abiraterone, this supports adding metastasis-directed SBRT; the signal does not extend to higher-volume mCRPC or the castration-sensitive oligomet setting.
- Does the OS benefit hold in a phase 3 powered for survival? recruiting Metastasis-directed Therapy in Oligoprogressive Castration-refractory Prostate Cancer Phase 3n=246 · primary completion 2029-01 · phase 3 MDT in oligoprogressive CRPC
- Optimal SBRT dose, fractionation, and site coverage in oligomet CRPC recruiting HIghly MetAstatic Life Prolonging Therapy-Resistant Prostate Cancer: Role of Stereotactic Radiotherapy for Bone and Lymph Node Metastases (HIMARS) Phase NAn=18 · primary completion 2028-05 · phase 1 SBRT max-tolerated-volume escalationrecruiting OligoCare TwiCs (Trials Within Cohorts) Trial Comparing Acute Toxicity in Single-fraction vs Multiple-fraction SBRT for Metastasis-directed Treatment (SPRINT) Phase NAn=302 · primary completion 2029-02 · single- vs multi-fraction SBRT for oligomets
- Which oligomet CRPC pts benefit most from MDT n=18 · primary completion 2023-07 · PSMA PET tests predictive value for MDT
📚 Sources · 📄 1 paper
Abstract
INDIBLADE
ForStage II/III MIBC, cT2-4aN0-2, bladder-preservation candidates
TL;DR2yr bladder-intact EFS 78% (67-90%) with induction ipi+nivo before chemoRT; 2yr OS 96% in cT2-4aN0-2 MIBC.
Cohort spans cT2-4a and clinically node-positive (N1-2), pushing bladder preservation into nodal disease that usually routes to cystectomy. The novel lever is induction ipi+nivo before chemoradiation, not the RT itself; 78% 2yr bladder-intact EFS tests whether induction dual-IO belongs in a trimodality pathway. RT dose and fractionation absent from source, so transferability stays unconfirmed.
7 details 4 trials watching
Single-arm bladder-preservation trial: induction dual checkpoint blockade followed by chemoradiation. N and site count not reported in source. Outcomes reported at 2 years.
Stage II/III MIBC, cT2-4aN0-2. Notably includes clinically node-positive (N1-2) disease, a group usually routed to radical cystectomy.
Induction ipilimumab + nivolumab (dual IO) before chemoradiation. Doses, cycles, and radiosensitizing chemotherapy not stated in source.
Chemoradiation is the definitive local component, but RT dose, fractionation, and target volume are not specified in source, gating whether the result transfers to a given practice.
Headline readout is 2yr bladder-intact event-free survival; overall survival reported alongside.
Single-arm, no comparator vs chemoRT alone or cystectomy; short 2yr follow-up; bladder-intact EFS is a composite surrogate; N and RT details absent from source.
Single-arm, no comparator vs chemoRT alone or cystectomy; 2yr follow-up; bladder-intact EFS a composite surrogate. Hypothesis-generating induction-IO-plus-CRT signal, not yet mature.
In cT2-4aN0-2 MIBC weighing bladder preservation against radical cystectomy, this signals induction ipi+nivo plus chemoradiation is feasible even with node-positive disease, but single-arm 2yr data do not yet displace cystectomy or chemoRT alone off-protocol.
- Does induction ipi+nivo improve bladder-intact EFS vs chemoRT alone? n=50 · primary completion 2024-07 · MMC/cape chemoRT + nivo±ipi, nivo-mono comparator armn=50 · primary completion 2025-09 · induction ipi+nivo → chemoRT, cT2-4aN0-2 bladder-sparing
- Durability of bladder preservation beyond 2 years n=30 · primary completion 2027-06 · long-term bladder-preservation outcomes post-NAT TMT
- Does bladder preservation extend to node-positive (N1-2) MIBC? n=11 · primary completion 2026-02 · chemoRT ± durvalumab, node-positive bladder cancer
📚 Sources · 🐦 1 tweet
‼️ INDIBLADE: stage II/III (cT2-4aN0-2) MIBC -> induction ipilimumab plus nivolumab -> CRT
— NonsparseOncologist (@5_utr) June 17, 2026
2-year bladder-intact event-free survival is 78% (0.67−0.9) 🤩
2-year overall survival was 96% (0.91−1)
Lots of bladders can be potentially spared!https://t.co/LzTe72GYHD
DOREMY NCT02106312
ForLocalized translocation-confirmed myxoid liposarcoma, trunk/extremity
TL;DR5yr local recurrence-free survival 97.4% after de-escalated 36Gy/18fx preop RT in myxoid liposarcoma; wound complications 21%.
The RT read is dose de-escalation: 36Gy/18fx (vs the standard 50Gy/25fx) held 5yr LRFS at 97.4% in translocation-confirmed MLS, with wound complications 21% and G3 late toxicity 3%. Exploiting MLS radiosensitivity trims ~14Gy without a local-control cost, moving the preop-dose decision for this histology specifically.
7 details 4 trials watching
Phase 2 single-group nonrandomized trial, N=90, 9 tertiary sarcoma centers (Europe + US), enrolled 2010-2020. Median follow-up 66.4 mo (IQR 48.8-87.5).
Adults with biopsy-proven, translocation-confirmed localized MLS of trunk or extremity. Mean age 47, 56% male.
36 Gy in once-daily 2-Gy fractions (18 fx) preoperatively, against the standard 50 Gy/25 fx for soft-tissue sarcoma. Delivered per protocol in all 90 pts, then resection.
5yr LRFS 97.4% (95% CI 93.9-100) is the standout; PFS 81.0%, DSS 89.5%, OS 88.5% (full set in table). 3 pts (3%) progressed to metastasis before surgery.
| Endpoint (5yr) | Rate | 95% CI |
|---|---|---|
| Local recurrence-free survival | 97.4% | 93.9-100 |
| Progression-free survival | 81.0% | 72.6-89.4 |
| Disease-specific survival | 89.5% | 82.6-96.4 |
| Overall survival | 88.5% | 81.2-95.8 |
Wound complications in 18 pts (21%), 14 (16%) needing intervention. Late toxicity: G2 in 13 (15%), G3 in only 3 (3%).
Standard preoperative dose for soft-tissue sarcoma is 50 Gy/25 fx. MLS is highly radiosensitive, which motivates cutting ~14 Gy to 36 Gy while preserving local control.
Single-arm, no randomized comparator vs 50 Gy; equivalence inferred, not proven. Rare cancer makes a phase 3 impractical (authors' argument).
Single-arm nonrandomized phase 2; no randomized comparator vs standard 50Gy. Long follow-up, but efficacy equivalence is inferred, not tested. Single-arm design caps the read.
In localized, translocation-confirmed myxoid liposarcoma of the trunk or extremity, this supports reduced-dose 36Gy preop RT as an option; it does not extend to other soft-tissue sarcoma histologies that lack this radiosensitivity.
- Non-inferiority vs standard 50Gy preop RT unproven n=300 · primary completion 2031-01 · prospective MLS registry: 36Gy vs 50Gy preop RT
- Generalizability to non-myxoid soft-tissue sarcoma histologies n=15 · primary completion 2027-05 · hypofrac preop RT in mixed extremity/trunk STSn=150 · primary completion 2028-11 · 14x3Gy hypofrac preop RT across STS histologiesrecruiting Assessment of the Long-term Efficacy of Moderately Hypofractionated Neoadjuvant Radiotherapy Soft Tissue Sarcoma in the Limbs or Trunk Wall Phase 2n=135 · primary completion 2032-06 · mod-hypofrac neoadj RT, all STS grades, LC endpoint
📚 Sources · 📄 1 paper
Abstract
REVELUTION
ForIntermediate/high-risk non-metastatic prostate on definitive RT + ADT
68.9 mm³ more plaque with leuprolide vs relugolix
Adjusted for age, statin, baseline plaque; crude 56 vs 25 mm³
TL;DR68.9 mm³ greater total coronary plaque progression with leuprolide vs relugolix at 12mo (adjusted), non-metastatic prostate on RT + ADT.
Reported via UroToday →
The signal is non-calcified plaque: leuprolide added 68.9 mm³ more total plaque than relugolix at 12mo (adjusted), and that gap tracked the non-calcified subtype, with no significant difference in calcified or low-attenuation plaque. For a radonc co-prescribing ADT with definitive RT, it strengthens the mechanistic case for relugolix in cardiovascular-risk pts.
8 details 3 trials watching
Single-institution, open-label, parallel-cohort randomized trial (4 Emory-affiliated centers, Jun 2020-2024). ADT-eligible pts randomized 1:1 relugolix vs leuprolide, stratified by ASCVD 10-yr risk; a lower-risk radiotherapy-alone cohort ran in parallel as a no-ADT control. N=94.
Non-metastatic intermediate/high-risk prostate cancer, all receiving pelvic RT (± pelvic nodes). ADT arms received ≥6 months hormone therapy; the control cohort was lower-risk, RT-alone, with no planned ADT.
Relugolix 360mg load then 120mg daily vs leuprolide 3-month depot. Serial coronary CTA at baseline and 12mo, blinded to arm, quantified by the HeartFlow automated tool.
Primary: 12-month change in total plaque volume. Secondary: non-calcified, calcified, and low-attenuation plaque subtypes.
Adjusted mean total-plaque difference 68.9 mm³ favoring relugolix; crude 12-mo change 56 vs 25 mm³ (leuprolide vs relugolix). Excess driven by non-calcified plaque; calcified and low-attenuation subtypes showed no significant difference.
Offers a coronary-atherosclerosis mechanism for HERO (2020), where relugolix showed lower MACE than leuprolide despite similar testosterone suppression and metabolic effects.
Surrogate imaging endpoint (plaque volume), not clinical MACE; small single-institution N=94, 12-month follow-up. Open-label, with a non-randomized RT-alone control cohort.
Small single-institution randomized trial, surrogate coronary-plaque imaging endpoint (not clinical MACE), 12-mo f/u; mechanistically supports HERO but doesn't independently establish clinical benefit.
In an intermediate or high-risk non-metastatic prostate pt getting definitive RT plus ADT with elevated cardiovascular risk, this supports favoring relugolix over leuprolide on a coronary-plaque basis; it does not extend to ADT-free lower-risk pts or to hard cardiovascular-event rates.
- Do plaque-volume differences translate to fewer clinical cardiovascular events? recruiting Effects of Relugolix vs Leuprolide on Cardiac Function in Patients With Prostate Cancer Phase 2n=70 · primary completion 2027-12 · phase 2 relugolix vs leuprolide cardiac function MRIrecruiting REVELUTION-2: Relugolix+Abiraterone Acetate (AA) Versus Leuprolide+AA Cardiac Trial Phase 3n=72 · primary completion 2029-07 · phase 3 relugolix vs leuprolide cardiac head-to-head
- Durability of plaque effect beyond 12 months recruiting REVELUTION-2: Relugolix+Abiraterone Acetate (AA) Versus Leuprolide+AA Cardiac Trial Phase 3n=72 · primary completion 2029-07 · up to 24-mo combination arm, cardiac readout to 2029
- Generalizability beyond single-institution N=94
📚 Sources · 📄 1 paper
Abstract
ORIOLE NCT02680587
ForRecurrent HSPC, 1-3 conventional-imaging mets, off ADT ≥6mo
19% vs 61%
P=.005; SABR vs observation
TL;DR6-mo progression 19% vs 61% favoring SABR (P=.005); mPFS NR vs 5.8mo, HR 0.30 (0.11-0.81) in oligomet HSPC.
Surfaced from a review's discussed trials
The RT read is completeness, not SABR alone: among SABR pts, leaving any PSMA-avid lesion untreated collapsed DMFS to 6.0 vs 29.0 mo (HR 0.19, 0.07-0.54). Conventional imaging under-stages, so PSMA-PET staging plus total consolidation, not partial MDT, is the decision this moves. SABR dose/fractionation not reported in source.
9 details 5 trials watching
Phase 2 randomized trial, 2:1 SABR vs observation, N=54 at 3 US radiation centers. Primary: composite progression at 6 mo. Median follow-up 18.8 mo.
Recurrent hormone-sensitive prostate cancer, 1-3 asymptomatic mets ≤5 cm on conventional imaging, prior definitive treatment of the primary. No ADT within 6 mo. Median age 68.
SABR to all conventional-imaging metastases; PSMA-PET obtained but blinded to planning. Dose/fractionation not reported in source. Local control 98.9% at 6 mo.
Because PET was blinded, 16/36 SABR pts had untreated PET-avid lesions; any untreated lesion collapsed DMFS to 6.0 vs 29.0 mo (HR 0.19). Total consolidation, not SABR per se, drove the benefit.
Concordant with STOMP (phase 2 MDT in oligomet PC): both show metastasis-directed therapy delays progression and defers ADT. The pooled ORIOLE+STOMP analysis reinforced the signal.
Phase 2, N=54; composite surrogate primary read at 6 mo, not OS-powered. Open-label observation control. Conventional-imaging staging misses PET-avid disease.
| Endpoint | SABR | Observation | Effect |
|---|---|---|---|
| 6-mo progression (composite) | 7/36 (19%) | 11/18 (61%) | P=.005 |
| 6-mo PSA progression | 4/36 (11%) | 9/18 (50%) | P=.005 |
| Median PFS | Not reached | 5.8 mo | HR 0.30 (0.11-0.81), P=.002 |
| Median biochemical PFS | Not reached | 6.4 mo | HR 0.31 (0.13-0.75), P=.002 |
| Endpoint | No untreated | Any untreated | Effect |
|---|---|---|---|
| 6-mo progression | 1/19 (5%) | 6/16 (38%) | P=.03 |
| Median PFS | Not reached | 11.8 mo | HR 0.26 (0.09-0.76), P=.006 |
| New mets 180d | 3/19 (15.8%) | 10/16 (62.5%) | P=.006 |
| DMFS | 29.0 mo | 6.0 mo | HR 0.19 (0.07-0.54), P<.001 |
Phase 2, N=54; composite progression primary read at only 6mo. Randomised but small, short f/u. Concordant with STOMP MDT signal; awaits phase 3.
In recurrent HSPC with 1-3 conventional-imaging mets and off ADT ≥6mo, this supports metastasis-directed SABR to defer systemic therapy; it does not extend to higher-volume or castration-resistant disease.
- Overall survival benefit of metastasis-directed SABR recruiting Stereotactic Ablative Radiotherapy (SABR) for the Treatment of Patients With Metastatic Cancer, ID-COMET Trial Phase 3n=800 · primary completion 2032-09 · phase 3 SABR vs 3-mo delay, survival endpoint
- Role of PSMA-PET staging before consolidative SABR n=140 · primary completion 2025-05 · PSMA vs fluciclovine PET for RT planningactive Multicenter Randomized Trial of 68Ga-PSMA-11 PET/CT Based SRT After Radical Prostatectomy Phase 3n=193 · primary completion 2027-07 · randomized 68Ga-PSMA PET-guided RT vs standard
- SABR benefit in higher-volume or ADT-dependent disease active Androgen Deprivation Therapy for Oligo-recurrent Prostate Cancer in Addition to radioTherapy Phase 3n=280 · primary completion 2027-10 · phase 3 MDRT ± ADT vs MDRT alone, MPFSrecruiting HIghly MetAstatic Life Prolonging Therapy-Resistant Prostate Cancer: Role of Stereotactic Radiotherapy for Bone and Lymph Node Metastases (HIMARS) Phase NAn=18 · primary completion 2028-05 · SBRT volume-escalation in high-volume mets
📚 Sources · 📄 1 paper
Abstract
RADIOSA NCT03940235
ForMetachronous oligorecurrent HSPC, ≤3 lesions, post-radical local tx
TL;DRmcPFS 32.2 vs 15.1mo, HR 0.43 (0.26-0.72), p=0.001 adding 6mo ADT to metastasis-directed SBRT in oligorecurrent HSPC.
Surfaced from a review's discussed trials
Both arms get ablative SBRT (30 Gy/3fx, BED >100 Gy) to all sites, so the trial isolates the 6-mo ADT add-on, not SBRT's own contribution (no observation arm). The decision it moves: whether to layer short ADT onto metastasis-directed SBRT. SBRT alone still gave 15.1-mo cPFS in selected pts.
Also covered May 17
8 details 2 trials watching
Single-centre, randomised, open-label phase 2 (European Institute of Oncology, Milan). N=105 randomised 1:1 (52 SBRT alone, 53 SBRT+ADT); modified ITT, 51/arm analysed. Median follow-up 31 mo.
Metachronous oligorecurrent hormone-sensitive prostate cancer after radical local treatment; ≤3 lesions (pelvic/extra-regional nodal or bone) on PSMA-PET or MRI; ECOG 0-1; median age 70. Stratified by PSMA-DT (≤3 vs >3 mo), site (node vs bone), imaging.
SBRT 30 Gy in 3 fractions every other day (EQD2 98.6 Gy at α/β 1.5, BED >100 Gy), or equivalent by site. All oligometastatic sites treated in both arms.
The SBRT+ADT arm added 6 months of LHRH-analogue ADT starting within 1 week before SBRT.
Primary: clinical progression-free survival. OS and time-to-CRPC were not the primary read.
Adding short ADT roughly doubled median cPFS; effect sizes in the results table.
Near-absent RT toxicity: 1 G1 GI, 1 G3 GU (left ureter stenosis, SBRT+ADT), no late effects. ADT added 22 G1 AEs, all resolved. No treatment-related deaths.
First RCT of adding short ADT to MDT in metachronous oligorecurrent HSPC. STOMP/ORIOLE established MDT vs observation; RADIOSA instead isolates the ADT add-on onto an SBRT backbone.
Single-centre, open-label, N=105. Primary endpoint is clinical PFS, a surrogate; ADT's own progression-delaying effect confounds the SBRT+ADT arm. Optimal ADT duration untested.
Single-centre open-label phase 2, N=105; 1° EP is clinical PFS (surrogate), not OS. Consistent with STOMP/ORIOLE MDT signals; not definitive enough to change practice.
In metachronous oligorecurrent hormone-sensitive prostate cancer with ≤3 lesions on PSMA-PET, this supports adding 6 mo ADT to metastasis-directed SBRT for longer cPFS; it does not address synchronous or polymetastatic disease, and SBRT alone remains reasonable in carefully selected pts.
- Optimal duration of ADT added to SBRT active Androgen Deprivation Therapy for Oligo-recurrent Prostate Cancer in Addition to radioTherapy Phase 3n=280 · primary completion 2027-10 · phase 3 ADT added to MDRT vs MDRT alonen=532 · primary completion 2031-02 · tests timing of ADT+ARPI added to SBRT in mHSPC
- Biomarkers predicting benefit from SBRT alone
- Whether cPFS gain translates to OS or delayed CRPC
📚 Sources · 📄 1 paper
Abstract
ARTO NCT03449719
ForOligometastatic CRPC, ≤3 nonvisceral mets, first-line abiraterone
92% vs 68.3%
OR 5.34 (95% CI 2.05-13.88), P=.001
TL;DRAdding SBRT to abiraterone lifted 6-mo PSA response to 92% vs 68.3% (OR 5.34) and cut progression (PFS HR 0.35) in oligomet CRPC.
Surfaced from a review's discussed trials
The RT read is total metastatic consolidation: SBRT to all ≤3 CRPC sites concurrent with abiraterone more than doubled complete PSA response (56% vs 23.2%) and cut progression risk (HR 0.35). It pushes MDT beyond hormone-sensitive oligomet (ORIOLE/STOMP) into first-line CRPC, moving the decision to irradiate every lesion, not defer.
Also covered Jul 7
6 details 5 trials watching
Multicenter randomized phase II, 1:1, N=157, enrolled Jan 2019-Sep 2022. Primary: 6-month biochemical response.
Oligometastatic castration-resistant prostate cancer with ≤3 nonvisceral metastatic lesions, in the first-line abiraterone setting.
Both arms received abiraterone acetate + prednisone (AAP). The experimental arm added concomitant SBRT.
SBRT to all sites of disease, concomitant with AAP. Dose/fractionation not reported in source.
Primary: biochemical response (PSA drop ≥50% at 6mo). Secondary: complete BR (PSA <0.2 ng/mL), PFS.
Primary endpoint and PFS both met, favoring the SBRT arm (see results table).
| Endpoint (6mo) | AAP+SBRT | AAP alone | Effect size |
|---|---|---|---|
| Biochemical response (PSA ≥50% drop) | 92% | 68.3% | OR 5.34 (2.05-13.88), P=.001 |
| Complete BR (PSA <0.2 ng/mL) | 56% | 23.2% | OR 4.22 (2.12-8.38), P<.001 |
Extends the metastasis-directed SBRT benefit seen in ORIOLE/STOMP (hormone-sensitive oligomet) into first-line CRPC.
Phase II, N=157. Primary endpoint is a PSA surrogate with no OS reported; dose/fractionation and long-term durability not in source.
Randomized phase II, primary hit, named comparator (AAP alone); primary is a PSA surrogate, so supportive of the emerging oligomet MDT paradigm rather than practice-setting.
In oligometastatic CRPC (≤3 nonvisceral mets) starting first-line abiraterone, this supports adding SBRT to all sites for deeper PSA response and longer PFS; it does not extend to visceral or polymetastatic disease.
- OS benefit of adding SBRT in oligomet CRPC recruiting Metastasis-directed Therapy in Oligoprogressive Castration-refractory Prostate Cancer Phase 3n=246 · primary completion 2029-01 · phase 3 MDT vs SOC in oligoprogressive CRPCrecruiting Treatment With Darolutamide +/- Radiation Therapy for Patients With a Castration Resistant Cancer and Metastases Detected by Functional Imaging Phase 3n=336 · primary completion 2029-10 · phase 3 darolutamide ± SBRT in metastatic CRPC
- Optimal SBRT dose/fractionation for CRPC metastases recruiting OligoCare TwiCs (Trials Within Cohorts) Trial Comparing Acute Toxicity in Single-fraction vs Multiple-fraction SBRT for Metastasis-directed Treatment (SPRINT) Phase NAn=302 · primary completion 2029-02 · single- vs multi-fraction SBRT for oligomets
- Does MDT delay next systemic therapy in CRPC? n=102 · primary completion 2027-04 · SBRT to postpone 2nd-line systemic tx in CRPCn=66 · primary completion 2030-11 · SBRT + darolutamide to defer 2nd-line in M0CRPC
📚 Sources · 📄 1 paper
Abstract
RTOG 0539 NCT00895622
ForWHO grade 1-3 meningioma, post-resection, newly diagnosed or recurrent
TL;DR10-yr PFS 72.2% intermediate-risk (54Gy) and 42.5% high-risk (60Gy) meningioma on adjuvant RT; low-risk observed 85.2%.
The RT read is patient selection: low-risk grade 1 (GTR/STR) observed carried only 8.9% 10-yr cumulative progression, backing omission, while intermediate-risk earns 54Gy/30fx adjuvant. High-risk 60Gy still leaves 39.3% 10-yr progression, marking the ceiling of adjuvant RT alone in grade 2/3 disease.
7 details 5 trials watching
Prospective phase 2, multi-institutional (NRG/RTOG), risk-adapted by WHO grade, extent of resection, and recurrence status. 244 consented, 165 protocol-treated. Central pathology review; data cutoff 8/15/2023.
Adults ≥18, Zubrod 0-1, histologically confirmed unifocal WHO grade 1-3 meningioma, any resection extent. Low-risk n=60, intermediate n=52, high-risk n=53.
Intermediate-risk 54 Gy and high-risk 60 Gy, both in 30 fractions, adjuvant. Low-risk received no RT (observation). No hypofractionation or SRS arm.
Primary (3-yr PFS) reported previously. This analysis reports long-term PFS, OS, and cumulative incidence of progression (competing-risk) at ~12-yr median follow-up.
Per-cohort 10-yr PFS, OS, and cumulative-incidence values are in the table above. Median PFS not reached for low- and intermediate-risk.
| Cohort (management) | 10-yr PFS | 10-yr OS | 10-yr cum. incidence progression |
|---|---|---|---|
| Low-risk, observed | 85.2% | 94.1% | 8.9% (3.2-18.2) |
| Intermediate, 54Gy | 72.2% | 84.7% | 21.2% (10.8-33.9) |
| High-risk, 60Gy | 42.5% | 51.1% | 39.3% (25.8-52.5) |
RT-attributable grade 3+ toxicity 9.6% (intermediate, 5/52) and 15.1% (high-risk, 8/53). The observed low-risk cohort carried no RT toxicity.
No randomised RT-vs-observation trial in grade 2 meningioma has reported. ROAM/EORTC-1308 and NRG-BN003 (GTR grade 2) remain open; RTOG 0539 is the prospective benchmark.
Each risk cohort is single-arm, no randomised RT-vs-observation comparison; modest per-cohort N (~50-60); grading predates molecular integration into WHO CNS grading.
Prospective multi-institutional risk-adapted phase 2, 12-yr mature f/u, sets RT patient-selection benchmark. Each cohort single-arm; no randomised RT-vs-observation comparison.
In newly diagnosed grade 1 meningioma after gross or subtotal resection, this supports observation over adjuvant RT; it does not soften the case for 54-60Gy in recurrent grade 1, grade 2, or grade 3 disease.
- Randomised confirmation of RT omission after GTR of grade 2 meningioma not yet Efficacy of Postoperative Radiotherapy for Atypical Meningioma Without Venous Sinus Invasion After Gross-total Resection Phase NAn=140 · primary completion 2028-01 · postop RT need after GTR of atypical WHO II
- Role of dose escalation or systemic therapy for high-risk (grade 3) disease active An Open-Label Phase II Study of Nivolumab or Nivolumab/Ipilimumab in Adult Participants With Progessive/ Recurrent Meningioma Phase 2n=40 · primary completion 2024-12 · nivo/ipi for progressive/recurrent WHO IIIrecruiting Combination of Everolimus and 177Lu-DOTATATE in the Treatment of Grades 2 and 3 Refractory Meningioma: a Phase IIb Clinical Trial Phase 2n=28 · primary completion 2026-03 · everolimus + Lu-DOTATATE, refractory WHO 2/3active A Trial of Increased Dose Intensity Modulated Proton Therapy (IMPT) for High-Grade Meningiomas Phase NAn=21 · primary completion 2027-08 · IMPT dose intensification for high-grade WHO II/IIIn=90 · primary completion 2028-12 · proton dose escalation 68-72 Gy, WHO II/III
- Molecular grading integration to refine risk stratification
📚 Sources · 📄 1 paper
Abstract
RAD-IO
ForT2-T4a N0M0 muscle-invasive urothelial bladder cancer
TL;DR12-mo DFS 40/50 (80%, 95% CI 0.67-0.89) cleared the pre-set ≥75% GO bar for durvalumab added to 5FU/MMC chemoRT in MIBC.
RT is standard and transferable: 55Gy/20fx to bladder, plus 46Gy/20fx elective nodal coverage in the node-positive expansion, extending durvalumab-chemoRT preservation to N+ disease. 12-mo DFS 80% (40/50, 95% CI 0.67-0.89) cleared the pre-set ≥75% GO bar vs BC2001. Moves whether to layer IO onto a hypofractionated preservation backbone.
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8 details 4 trials watching
Single-arm, multi-stage feasibility and safety trial testing durvalumab added to 5FU/MMC chemoradiation for bladder preservation. Benchmarked against BC2001 historical CRT data, not a randomised comparator.
T2-T4a N0M0 urothelial muscle-invasive bladder cancer, stratified by prior neoadjuvant chemotherapy (yes vs no). A stage-1 expansion added the first 6 node-positive pts.
Durvalumab 1500 mg given neoadjuvant, synchronous, and adjuvant to 12 months post-chemoRT. Concurrent 5-FU 500 mg/m²/24h ×5 days and mitomycin C 12 mg/m².
55 Gy in 20 fractions to bladder (hypofractionated). Node-positive expansion added 46 Gy/20 fx elective nodal RT.
Primary: 12-month disease-free survival post-chemoRT, read against a GO/NO-GO framework (GO ≥75%, contextual 60-75%, NO-GO <60%).
12-mo DFS 40/50 (80%), 95% CI 0.67-0.89, clearing the ≥75% GO bar. 33/54 (61%) completed planned durvalumab; investigators reported very high bladder-preservation and DFS vs prior trial data.
AEs reported in line with component therapies (chemoRT plus durvalumab). 21/54 (39%) discontinued durvalumab early.
Benchmarked against BC2001 (James, JCO 2016), where adding 5FU/MMC to RT gave DFS HR 0.78 (0.60-1.02), p=0.07. RAD-IO's 80% 12-mo DFS is claimed higher than prior data, but the comparison is non-randomised.
Single-arm with a historical benchmark and no concurrent IO comparator; 12-mo DFS is an early surrogate; small N (~50 evaluable); node-positive experience limited to 6 pts.
Single-arm feasibility stage, no randomised IO comparator; benchmarked against historical BC2001. 12-mo DFS an early surrogate at small N; met pre-set GO bar for further evaluation only.
In T2-T4a N0M0 MIBC opting for bladder preservation, this supports durvalumab layered onto 5FU/MMC chemoRT as worth further evaluation; it does not yet establish that IO improves on chemoRT alone, and node-positive experience rests on only 6 expansion pts.
- Does durvalumab add over chemoRT alone in a randomised trial n=11 · primary completion 2026-02 · randomised chemoRT ± durvalumab in node+ MIBC
- Durability of bladder preservation and DFS beyond 12 months active Treating Muscle-invasive Bladder Cancer With A Non-surgical Method Consisting of Anti-PD-1 Therapy and Chemoradiation Phase 2n=71 · primary completion 2025-12 · IO+chemoRT bladder preservation, phase 2recruiting Enfortumab Vedotin in Combination With Pembrolizumab vs. Concurrent Chemoradiotherapy (cCRT) in People With Muscle Invasive Bladder Cancer (EV-309) Phase 3n=390 · primary completion 2030-03 · phase 3 EV+pembro vs cCRT bladder preservation
- Efficacy in node-positive MIBC beyond the 6-patient expansion n=11 · primary completion 2026-02 · durvalumab+chemoRT in node-positive bladder ca
📚 Sources · 🐦 3 tweets
RAD-IO: chemoradiation (5FU+MMC) + Durva in MIBC. #ASCO26 pic.twitter.com/yTyhkdjCox
— Álvaro Pinto (@dralvaropinto) May 30, 2026
#ASCO26 🔬 Abstract 4504 | RAD-IO
— Dra. María Natalia Gandur Quiroga (@nataliagandur) May 30, 2026
Durvalumab + chemoradiotherapy in muscle-invasive bladder cancer
Presented by Nicholas D. James, PhD, MBBS, FRCP@OncoAlert@ASCO
Bladder preservation in MIBC remains one of the most important curative-intent questions in GU oncology.
The key… pic.twitter.com/W6JqzTVsJ3
RAD-IO at #ASCO26: durvalumab added to chemoradiation in muscle-invasive bladder cancer cleared its efficacy bar in a bladder-preservation approach. Single-arm, benchmarked against prior CRT data.
— Katy Beckermann (@katy_beckermann) May 30, 2026
Durvalumab given before, during, and 12 months after chemoRT (55Gy/20Fr +… pic.twitter.com/UXxwoZzaMC
A-DREAM
FormHSPC deep responder (PSA<0.2) after 18-24mo ADT + ≥12mo ARPI
TL;DR41% remained treatment-free with eugonadal testosterone recovery at 18mo after interrupting ADT+ARPI in deep-responding mHSPC (1° EP met, one-sided p=0.0249).
In metastatic HSPC deep responders (PSA<0.2 after ≥18mo ADT and ≥12mo ARPI, predominantly low-volume), this supports discussing a monitored ADT+ARPI holiday with scheduled PSA/imaging; it does not extend to incomplete responders or high-volume disease.
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8 details 4 trials watching
Phase 2 single-arm Alliance trial. N=78 eligible metastatic HSPC deep responders interrupt ADT+ARPI. Enrolled 07/2022-03/2024; median follow-up 26.9mo.
Entry required PSA<0.2 (stable/falling) after 18-24mo ADT and ≥12mo ARPI. Median age 70 (49-90); 64.9% low-volume, 35.1% high-volume (CHAARTED); 51.3% had prior local radiation, 29.5% metastasis-directed radiation.
Primary: treatment-free with eugonadal testosterone (≥150 ng/dL) at 18 months. Exploratory: rPFS, TTNT, OS, cost.
Primary met: 32/78 (41.0%) treatment-free and eugonadal at 18mo (80% CI 33.1-48.9%, one-sided p=0.0249). 57.7% were treatment-free at 18mo and 66.7% recovered testosterone; median time to eugonadal T 9.0mo.
Disease control held through interruption: rPFS 15/78 events, OS 4/78 events, both medians not reached. The 41% primary is capped by slow testosterone recovery, not progression, so the endpoint understates short-term oncologic safety in this older cohort.
Single-arm with no randomised comparator against continued therapy, so the survival cost of interruption is unquantified. Median follow-up 26.9mo is short for mHSPC; durability of treatment-free intervals is unproven.
Single-arm phase 2, N=78, no randomised comparator vs continued therapy; primary endpoint met but interruption safety needs longer follow-up and randomisation.
- Survival cost of interruption vs continued ADT+ARPI active A Study of an Intermittent ADT Approach With Apalutamide Monotherapy in Participants With mCSPC Phase 3n=420 · primary completion 2026-10 · intermittent post-response, rPFS non-inferiorityn=1600 · primary completion 2035-05 · phase 3 intermittent vs continuous, OS endpoint
- Durability of treatment-free interval beyond 27 months
- Which deep responders can safely interrupt active A Study of an Intermittent ADT Approach With Apalutamide Monotherapy in Participants With mCSPC Phase 3n=420 · primary completion 2026-10 · restricted to PSA <0.2 deep respondersrecruiting Optimal PSA Triggered Individual Management of Androgen Sensitive Prostate Cancer Phase 2n=160 · primary completion 2030-10 · intermittent ARPI in optimal PSA responders
📚 Sources · 🐦 1 tweet
Can treatment be safely stopped in selected patients with mHSPC?
— MJosé Juan (@mjuanfi81) May 30, 2026
Phase II A-DREAM trial, 41% of responders remained treatment-free with testosterone recovery 18m after stopping ADT/ARPI. At a median FU of 21 months, 35% of patients required treatment re-initiation.@OncoAlert pic.twitter.com/iW2VDBWWhN
ARACOG (AFT-47)
ForAdvanced prostate cancer (mHSPC/mCRPC/nmCRPC) starting an ARSI
TL;DRMCCD -36.1 (enza) vs -15.8 (daro), P=0.009 at 24 wk: enzalutamide worse for cognition; randomized open-label phase 2, N=111 advanced prostate.
In advanced prostate cancer pts where cognitive tolerability drives ARSI selection, this randomized head-to-head supports darolutamide over enzalutamide for cognitive sparing; it does not address efficacy or compare against apalutamide or abiraterone.
| Arm (N) | Max-changed domain | Median % change | P |
|---|---|---|---|
| Darolutamide (48) | PALFAM (visual mem/exec) | -15.8 | 0.009 |
| Enzalutamide (47) | SWM (working mem/exec) | -36.1 | n/a |
+1 more figure
7 details 2 trials watching
Randomized open-label phase 2, N=111, darolutamide vs enzalutamide, stratified by age (<65, 65-80, >80). US academic centers only; enrolled 8/2021 to 3/2025, crossover permitted.
Advanced prostate cancer across mHSPC, mCRPC, and nmCRPC. Required acceptable enzalutamide co-pay; predominantly White, with most non-White pts randomized to enzalutamide.
Darolutamide provided by the study vs enzalutamide through standard of care, an asymmetry that could bias crossover and adherence.
Primary: between-arm % change from baseline to 24 wk in Maximally Changed Cognitive Domain (MCCD), from 5 remotely delivered CANTAB tests. Crossovers scored at crossover in their randomized arm.
MCCD median change -36.1 (enza, N=47) vs -15.8 (daro, N=48), P=0.009: greater cognitive decline on enzalutamide.
First randomized head-to-head of cognition for these two ARSIs; direction fits darolutamide's minimal blood-brain-barrier penetration vs enzalutamide's CNS exposure.
Open-label with a functional endpoint; enzalutamide via standard of care may have altered crossover. CANTAB is a research tool, not a clinical diagnostic; small N and race-by-arm imbalance limit inference.
Randomized head-to-head met its prespecified cognitive endpoint; aligns with darolutamide's known low CNS penetration. Phase 2, open-label, small N keep it below practice-changing.
- Does the cognitive advantage translate to functional outcomes or efficacy? n=102 · primary completion 2026-04 · tracks functional status + cognition on ARPIs
- Darolutamide vs apalutamide or abiraterone on cognition? n=102 · primary completion 2026-04 · cognitive outcomes across daro/apa/abi ARPIs
- Durability of the cognitive difference beyond 24 weeks
📚 Sources · 🐦 2 tweets
ARACOG (AFT-47) met its primary endpoint: enzalutamide caused significantly greater cognitive decline than darolutamide at 24 weeks in advanced prostate cancer.
— Katy Beckermann (@katy_beckermann) May 30, 2026
Randomized open-label phase 2, 111 pts (mHSPC, mCRPC, nmCRPC), DAR vs ENZ.
Cognition was measured with CANTAB, a… pic.twitter.com/kj4vfGRVyp
#ASCO26 GU Oncology Spotlight 🚨
— Dra. María Natalia Gandur Quiroga (@nataliagandur) May 30, 2026
🔬 Abstract 5005 | ARACOG / AFT-47
Cognitive effects of darolutamide vs enzalutamide
Presented by Alicia K. Morgans, MD, MPH, FASCO@CaPsurvivorship @OncoAlert@ASCO
In prostate cancer, we often discuss AR pathway inhibitors through the lens… pic.twitter.com/vpZr1w6kc6
ESAONA
ForTreatment-naive EGFR-mutant NSCLC with brain metastases
TL;DRiORR 95.5% vs 79.6% (p=0.0004) and icPFS HR 0.46 favoring asandeutertinib over osimertinib in 1L EGFR-mut NSCLC brain mets.
The RT-relevant read is upfront local therapy: iORR 95.5% vs 79.6% and intracranial PFS not reached (HR 0.46) strengthen deferring upfront SRS/WBRT in favor of TKI in EGFR-mut brain mets. No head-to-head vs radiosurgery, so it moves sequencing, not RT omission at progression.
7 details 5 trials watching
Randomised phase 2, N=224 (111 asandeutertinib vs 113 osimertinib), 1L EGFR-mutant NSCLC with brain metastases. All efficacy endpoints BICR-assessed. Blinding not specified in source.
Treatment-naive (1L) EGFR-mutant NSCLC with brain metastases. Mutation subtype, symptomatic status, and prior brain RT not reported in source.
Asandeutertinib (next-generation EGFR TKI) vs osimertinib. Dose and schedule not reported in source.
Intracranial endpoints (response, icPFS) drove the result and cleared significance more decisively than the borderline overall PFS benefit. Full arm comparison in the table above.
| Endpoint | Asandeutertinib | Osimertinib | HR (p) |
|---|---|---|---|
| iORR | 95.5% (89.8-98.5) | 79.6% (71.0-86.6) | p=0.0004 |
| Intracranial PFS | NR | 17.5 mo (15.18-NA) | HR 0.46, p=0.0020 |
| Overall PFS | NR | 17.2 mo (15.18-19.55) | HR 0.64, p=0.0473 |
Any TRAEs 99.1% vs 95.6%; serious TRAEs numerically higher with asandeutertinib (10.8% vs 7.1%). Fatal and discontinuation rates not reported in source.
Osimertinib is the established CNS-active 1L EGFR TKI (FLAURA). Asandeutertinib raises the intracranial bar in phase 2, but no OS or phase 3 head-to-head yet.
Phase 2 with immature time-to-event data (medians not reached); overall PFS benefit borderline (p=0.0473); no OS; blinding not specified.
Strong intracranial activity revives whether a CNS-active TKI can defer upfront brain-directed RT/SRS in EGFR-mutant NSCLC. Phase 3 confirmation vs osimertinib, plus OS and durability, is needed before displacing the standard.
Randomised phase 2; strong intracranial ORR but time-to-event immature (medians NR), overall PFS borderline (p=0.0473), no OS. Needs phase 3 before displacing osimertinib.
In treatment-naive EGFR-mutant NSCLC with brain metastases, this supports a TKI-first, SRS-deferred read; it does not extend to EGFR-wildtype disease or brain mets progressing on a prior EGFR TKI.
- Overall survival vs osimertinib recruiting TY-9591 in the Patients With EGFR Mutations in Advanced NSCLC With Brain Metastases Phase 2n=420 · primary completion 2025-06 · 1L TY-9591 vs osimertinib, EGFR brain metsn=380 · primary completion 2029-03 · phase 3 furmonertinib vs osimertinib in brain mets
- Durability of intracranial response with longer follow-up
- Head-to-head efficacy vs upfront radiosurgery n=162 · primary completion 2024-12 · osimertinib +/- early SRS, asymptomatic BMactive Study of Osimertinib + SRS vs Osimertinib Alone for Brain Metastases in EGFR Positive Patients With NSCLC Phase 2n=40 · primary completion 2025-04 · randomized osimertinib +/- upfront SRS, 1Lrecruiting Observation or Upfront Cranial RT in Oncogene Mutated NSCLC With Asymptomatic BM: A Phase III RCT Phase 3n=190 · primary completion 2025-12 · phase 3 upfront cranial RT vs obs on TKI
📚 Sources · 🐦 1 tweet
#ASCO26 🧠🌍
— Dr Rishabh Jain (@DrRishabhOnco) May 30, 2026
Could a next-generation EGFR TKI outperform osimertinib in patients with brain metastases?
The phase II ESAONA trial suggests the answer may be yes.
🧪 LBA2007 | ESAONA
1L EGFR-mutated NSCLC with brain metastases
👥 n=224
⚔️ Asandeutertinib vs Osimertinib
Key… https://t.co/mEOKGNKgf7 pic.twitter.com/pUQuH6i2cV
SPIN Score (Celiac Plexus SRS) NCT03323489
ForPancreatic cancer, intractable retroperitoneal pain, celiac SRS candidates
TL;DR89% pain response at SPIN 2 vs 32% at SPIN 0 for celiac SRS; post-hoc selection score, n=90.
Response is threshold-gated on baseline pain (>6 → 65.8%, rising to 85.7% at >8), and the strongest predictor was neurotoxic-chemo exposure (multivariate OR 5.1). The RT decision this moves is timing: refer for celiac SRS before neurotoxic agents. SRS dose/fractionation not reported in source (parent Lancet Oncol trial).
9 details
Post-hoc predictor analysis of the pivotal single-arm phase 2 celiac plexus SRS trial (NCT03323489, Lancet Oncol 2024). 90 evaluable pts; univariate/multivariate logistic regression with 500-iteration bootstrap internal validation.
Pancreatic-cancer pts with intractable retroperitoneal (celiac) cancer pain treated on the phase 2 SRS trial. Age and BMI were the prior-reported predictors; median baseline values not in source.
Celiac plexus radiosurgery, target D12-L2. Dose and fractionation not reported in source (specified in the parent Lancet Oncol trial), so transferability of the technique can't be judged here.
Pain response = ≥2-point reduction in average BPI-SF pain from baseline to 3 weeks. Score performance judged by optimism-corrected AUC.
Two independent predictors (severe baseline pain, no prior neurotoxic chemo) build a 0-2 score with a monotonic response gradient (see tables). Discrimination modest, AUC 0.714 corrected.
| SPIN score | Pain response | n |
|---|---|---|
| 0 | 32% | 31 |
| 1 | 53% | 40 |
| 2 | 89% | 19 |
| Predictor | Univariate OR | Multivariate OR |
|---|---|---|
| Neurotoxic chemo exposure | 5.33 (2.13-13.4), p<0.001 | 5.1, p=0.009 |
| Baseline pain intensity | 1.73, p=0.003 | 1.8, p=0.003 |
| Age | 1.06, p=0.014 | dropped (collinearity) |
| Therapy line | 0.65, p=0.04 | dropped (collinearity) |
Celiac plexus SRS is a novel non-invasive palliative option recently added to NCCN guidelines. This analysis converts the parent trial's flat response into an actionable selection score and argues for earlier use, before neurotoxic chemotherapy.
Post-hoc, single-arm data; predictors are associative. Internal bootstrap validation only (optimism-corrected AUC 0.714), external validation required. Subjective 3-week pain endpoint; score not prospectively tested.
Post-hoc predictor modeling of a single-arm phase 2; internal bootstrap validation only, external validation pending. Associations, not a prospectively validated selection tool.
In pancreatic-cancer pts with severe retroperitoneal pain and no prior neurotoxic chemo (SPIN 2), this supports earlier celiac plexus SRS, where 89% (n=19) achieved pain response; it does not extend to SPIN-0 pts, whose response was 32% (n=31).
- External validation of the SPIN score in an independent cohort
- Whether earlier SRS before neurotoxic chemo improves outcomes prospectively
- Durability of pain response beyond 3 weeks
📚 Sources · 🐦 1 tweet
Celiac SRS = convenient, effective tx for intractable pain, but who benefits most?
— Dr. Nina Niu Sanford (@NiuSanford) May 30, 2026
Post-hoc Ph2 analysis identified 2 response predictors (SPIN score): severe baseline pain & no prior neurotoxic chemo.
Supports earlier use before potential chemo neuropathy. #ASCO26 @OncoAlert pic.twitter.com/3qFYU6N1iD
PEACE V-STORM NCT03569241
ForPelvic nodal oligorecurrent prostate (≤5 nodes), post radical local Rx, PS 0-1
76% vs 63% at 4y
HR 0·62 (80% CI 0·44-0·86), p=0·063
TL;DR4-yr MFS 76% vs 63% favoring ENRT over MDT for pelvic nodal oligorecurrence, HR 0·62 (80% CI 0·44-0·86, p=0·063).
The RT read: whole-pelvis ENRT (45 Gy/25fx + SIB 65 Gy) beat node-only MDT on 4-yr MFS (76% vs 63%, HR 0·62), consistent with occult pelvic nodal disease driving the failures MDT leaves untreated. Moves the elective-nodal-coverage decision in ≤5-node pelvic recurrence.
7 details 1 trial watching
Phase 2, open-label, randomised (1:1) screening trial, 21 hospitals in 6 countries. 196 randomised (MDT 99, ENRT 97), 190 evaluable, modified ITT. Median follow-up 50 mo (IQR 42-58).
Men with PET-detected pelvic nodal oligorecurrence (≤5 nodes) after radical local prostate treatment; WHO PS 0-1, histologically confirmed adenocarcinoma. All male.
ENRT: 45 Gy/25fx whole pelvis + SIB 65 Gy to PET-positive nodes (or salvage LND). MDT: SBRT 30 Gy/3fx every other day (or salvage LND). Both + 6 mo ADT. Stratified by tracer (choline vs PSMA) and MDT type.
Primary: metastasis-free survival (any M1 on PET or death), modified ITT. Reported with 80% CIs, a phase 2 screening threshold, not the conventional 95%.
Grade 3 events low in both arms and numerically higher with ENRT (urinary incontinence, diarrhoea). No treatment-related deaths.
First randomised ENRT-vs-MDT comparison for nodal oligorecurrence. Prior oligomet RCTs (STOMP, ORIOLE) tested MDT vs observation, not elective nodal RT, so this adds the missing head-to-head.
Open-label; primary endpoint p=0·063 did not clear conventional significance and rests on a phase 2 screening design. Authors position ENRT as a potential standard awaiting phase 3.
| Endpoint | ENRT (80% CI) | MDT (80% CI) | HR (80% CI) |
|---|---|---|---|
| 4-yr MFS | 76% (69-81) | 63% (56-69) | 0·62 (0·44-0·86), p=0·063 |
| Grade 3 AE | ENRT | MDT |
|---|---|---|
| Urinary incontinence | 10% | 6% |
| Diarrhoea | 2% | 1% |
First randomised ENRT-vs-MDT comparison; ENRT's MFS edge diverges from MDT-favouring practice. Phase 2 screening design, p=0·063, awaits phase 3.
In men with PET-detected pelvic nodal-only oligorecurrence (≤5 nodes) after radical local treatment, this favors whole-pelvis ENRT over node-only MDT; it does not extend to extrapelvic M1, bone, or visceral oligometastatic recurrence.
- Phase 3 confirmation of ENRT superiority over MDT n=26 · primary completion 2029-07 · elective nodal SBRT added to MDT for nodal oligorecurrence
- Whether the MFS benefit translates to overall survival
- Long-term GU and GI toxicity of whole-pelvis ENRT with SIB
📚 Sources · 📄 1 paper
EXTEND Trial
ForOligometastatic solid tumors, 1-5 mets, on standard systemic therapy
HR 0.54
95% CI 0.41-0.72, p<0.001 (per-protocol, all baskets)
TL;DRMDT+SOC improved PFS across all baskets, HR 0.54 (0.41-0.72), p<0.001; RT delivered 98% of MDT.
The RT-relevant read is that this is essentially an SBRT trial (98% of MDT was radiotherapy) layered on top of continued systemic therapy, so the PFS gain is attributable to local ablation, not a systemic switch. The prostate-excluded HR 0.60 (0.40-0.89) is what matters for referrals outside prostate. Dose and fractionation are not in the source abstract, which gates transfer to practice.
Also covered May 17
9 details 5 trials watching
Multicenter randomized phase II basket trial, accrual 2018 to 2023. Six baskets (breast, pancreas, kidney, two prostate, "Other") each with basket-specific stratification and powering. Median follow-up 53 months.
Patients with 1-5 metastases from solid tumors, randomized to MDT+SOC vs SOC systemic therapy alone. Screened 521, randomized 350, 334 analyzed per protocol (MDT+SOC n=166; SOC n=168).
Radiotherapy was the MDT for 98% of metastases (370/379), so this reads as an ablative RT trial in all but name. Dose, fractionation, and technique are not reported in the source abstract.
Primary: PFS, pre-specified in the per-protocol set within each basket, across all baskets, and across all baskets excluding prostate. Exploratory: ctDNA and immune profiling.
Overall PFS HR 0.54 (0.41-0.72), p<0.001; excluding prostate baskets HR 0.60 (0.40-0.89). Basket-level superiority in pancreas, prostate, and "Other"; breast and kidney inconclusive. Per-basket effect sizes not reported in source.
Detectable ctDNA at enrollment tracked with shorter PFS and survival; 3-month ctDNA clearance tracked with improved survival, raising the option of a ctDNA-refined oligometastatic definition. Systemic immune activation after MDT was most pronounced in the baskets that showed PFS superiority, offered as a candidate mechanism.
Per-protocol, not ITT, primary analysis with 16 of 350 randomized patients excluded. Phase II with six baskets tested, so histology-specific claims are hypothesis-generating; no OS result reported in source.
Randomized phase II, primary PFS endpoint hit with 53mo f/u, but per-protocol analysis and basket design; histology signals explicitly framed as hypothesis-generating for phase III.
In pts with 1-5 metastases from pancreas or prostate primaries already on standard systemic therapy, this supports adding ablative MDT rather than systemic therapy alone; the breast and kidney baskets were inconclusive and do not carry the same read.
- Does MDT-driven PFS gain translate to overall survival recruiting Veterans Affairs Seamless Phase II/III Randomized Trial of STAndard Systemic theRapy With or Without PET-directed Local Therapy for Oligometastatic pRosTate Cancer Phase 2/3n=464 · primary completion 2026-09 · phase 2/3 SST +/- PET-directed local therapy, CRPC-FSn=873 · primary completion 2027-04 · phase 3 MDT +/- ADT/ARTA, n=873, PMFS endpointn=1200 · primary completion 2030-12 · n=1200 prospective LAT cohort, any-histology OMD
- Can ctDNA refine which oligometastatic pts benefit from MDT n=60 · primary completion 2027-12 · SABR cohort with ctDNA dynamics as biomarkerrecruiting Phase II Non-Randomized Study Evaluating POSLUMA-PSMA PET Response After Oligo- Metastatic/Progressive-directed Treatment With Radiotherapy (PROMPT-R) Phase 2n=50 · primary completion 2028-05 · ctDNA change after ablative RT vs PSMA-PET response
- Why were breast and kidney baskets inconclusive
📚 Sources · 📄 1 paper
Abstract
FASTRACK II NCT02613819
ForPrimary RCC ≤10 cm, medically inoperable or declined surgery, N0-N1
100% at 36, 60, and 84 mo
RECIST, intention-to-treat population; median f/u 62 mo
TL;DR100% freedom from local progression at 36, 60, and 84 months after single-fraction 26 Gy or 42 Gy/3fx SABR in inoperable primary RCC.
The size-adapted prescription is what transfers: 26 Gy × 1 for ≤4 cm, 42 Gy/3fx at 48 h intervals above that, in a cohort that was 65% T1b or higher (median 46 mm), not a small-tumour-enriched series. Two colonic obstructions place bowel as the constraint for central lesions.
10 details
Non-randomised phase 2, eight hospitals in Australia and the Netherlands (TROG 15.03, with ANZUP). Accrual July 28 2016 to Feb 27 2020: 71 enrolled, one withdrew consent before treatment, 70 treated. This report is the pre-planned final long-term follow-up, median 62 months (IQR 60-72).
Histologically confirmed primary RCC in pts who were medically inoperable, high risk, or declined surgery; ECOG ≤2; tumour ≤10 cm; N0-N1. Median age 77 (70-82), 70% male. Median tumour size 46 mm (37-55): T1a 34%, T1b 56%, T2a 9%, T3a 1%, with one N1 pt.
Size-adapted prescription: 26 Gy in a single fraction for tumours ≤4 cm, and 42 Gy in 3 fractions delivered 48 h apart for tumours >4 cm. No systemic therapy component.
Primary: freedom from local progression by RECIST, assessed in the intention-to-treat population, with safety co-assessed in ITT.
100% local control at 36, 60, and 84 months, with no local recurrences and no cancer-related deaths reported over median 62-month follow-up.
Seven pts (10%) had at least one treatment-related grade 3 event within 9 months: pain (abdominal/flank/tumour) 4 (6%), nausea and vomiting 3 (4%), colonic obstruction 2 (3%), diarrhoea 1 (1%). No grade 4 events, no treatment-related deaths, and no new long-term safety signals.
Single-arm and non-randomised: no head-to-head against partial nephrectomy, cryoablation, or radiofrequency ablation, which is the live comparison in the surgery-declining subset. N=70 with one N1 pt leaves nodal disease essentially untested. Industry co-funding (Varian) alongside Cancer Australia.
The value here is durability rather than magnitude: a flat 100% at 84 months in a cohort with median 46 mm tumours argues the ablative dose is adequate for lesions well beyond the small-renal-mass range where thermal ablation is usually deployed. The bowel events, not renal function, define the practical constraint for central tumours on the 3-fraction schedule.
Single-arm phase 2; no randomised comparator vs nephrectomy or thermal ablation. Long f/u and 100% local control do not lift a non-randomised design.
For a medically inoperable or surgery-declining pt with a T1b-T2a primary RCC ≤10 cm, this supports SABR as a definitive local option with durable 84-month local control; it does not address the surgically fit pt in whom partial nephrectomy remains untested against SABR.
- SABR vs partial nephrectomy in surgically fit pts
- SABR vs thermal ablation for T1b tumours
- Long-term renal function after single-fraction 26 Gy
📚 Sources · 📄 1 paper
Abstract
RADIOSA (MFS post-hoc)
ForOligorecurrent prostate cancer eligible for metastasis-directed SBRT
TL;DRPost-hoc MFS 16.6mo vs not reached, HR 0.39 favoring SBRT + 6mo ADT over SBRT alone in oligorecurrent prostate.
The additive read is the eugonadal MFS: benefit persisted after testosterone recovery (p<0.05), so the ADT effect is not just on-treatment suppression of imaging progression. That argues against reading RADIOSA's MFS split as a testosterone artifact, and moves the SBRT-alone vs SBRT + short-course ADT decision in oligorecurrence.
Also covered Jun 12
| Endpoint | Arm A (SBRT) | Arm B (SBRT + ADT) | Effect size |
|---|---|---|---|
| Metastatic progression | 32/51 (62.7%) | 19/51 (37.3%) | log-rank p=0.00079 |
| Median MFS | 16.6 mo (95% CI 12.83-NA) | not reached | HR 0.3894 (0.2201-0.6888), p=0.00119 |
+1 more figure
8 details 5 trials watching
Phase II randomized trial, 1:1, N=102, Arm A SBRT alone vs Arm B SBRT + 6-month ADT. Median follow-up (reverse KM) 49.23 months (95% CI 42.47-54.8). This report is a post-hoc analysis of MFS and eugonadal MFS.
Oligorecurrent prostate cancer. Detailed eligibility (number of lesions, imaging modality, prior local therapy, PSA thresholds) not reported in source.
SBRT to the oligorecurrent sites in both arms. Dose, fractionation, and target volume are not reported in source, which limits transfer to a specific practice.
MFS defined as randomisation to any M1 metastatic recurrence on imaging. Eugonadal MFS measured from testosterone recovery to new metastasis or last follow-up. KM curves compared by log-rank; HRs from Cox models.
Effect sizes are in the figure caption table. All Arm B pts except two reached testosterone recovery within follow-up.
Post-hoc analysis; MFS was not the prespecified primary endpoint. No OS reported in source, so the surrogate carries the read. Toxicity and SBRT technique parameters absent from source.
The eugonadal analysis is the substantive contribution: separating the benefit from on-treatment castration addresses the standing objection that ADT simply delays imaging-detected progression. Whether that reflects durable synergy between ablation and transient androgen suppression, as the authors argue, is hypothesis-generating at N=102.
Post-hoc endpoint analysis of a phase II trial; MFS was not the prespecified primary. Design dominates the read despite the clean randomisation and mature follow-up.
In oligorecurrent prostate cancer being considered for metastasis-directed SBRT, this supports the discussion of adding 6-month ADT over SBRT alone; it does not address de novo metastatic or castration-resistant disease, and the SBRT dose and target volume are not stated in the source.
- Does the MFS advantage translate to overall survival active Prostate-cancer Treatment Using Stereotactic Radiotherapy for Oligometastases Ablation in Hormone-sensitive Patients Phase 3n=550 · primary completion 2026-06 · phase 3 SBRT to all mets in hormone-sensitive M1
- Optimal ADT duration alongside metastasis-directed SBRT n=873 · primary completion 2027-04 · randomises 1mo vs 6mo ADT + ARTA on top of MDTrecruiting Duration of Androgen Receptor Pathway Inhibitor and ADT With Metastasis Directed Therapy in Oligometastatic Cancer of the Prostate (DIRECT) Phase 2n=132 · primary completion 2031-02 · ADT/ARPI duration arm: 8-9mo abiraterone added to SBRT
- Whether PSMA-PET staging changes the size of the benefit recruiting Veterans Affairs Seamless Phase II/III Randomized Trial of STAndard Systemic theRapy With or Without PET-directed Local Therapy for Oligometastatic pRosTate Cancer Phase 2/3n=464 · primary completion 2026-09 · randomises PET-directed local therapy vs systemic alonerecruiting Metastasis Directed Stereotactic Body Radiotherapy for Oligo Metastatic Hormone Sensitive Prostate Cancer Phase NAn=118 · primary completion 2031-12 · MD-SBRT randomised in PSMA-PET-defined 1-3 mets
📚 Sources · 🐦 1 tweet
Day TWO of #ESTRO26 Coverage by OncoAlert 🚨
— OncoAlert (@OncoAlert) May 16, 2026
Post-hoc analysis of metastasis-free survival (MFS) and Eugonadal MFS in the RADIOSA phase II randomized trial Presented by Giulia Marvaso 🇮🇹 #RadOnc ☢️ @giuliamarvaso84
Post-hoc analysis of RADIOSA shows SBRT plus short-term ADT… pic.twitter.com/1zpiChkUgA
OLIGOMA NCT04495309
ForOligometastatic breast, ≤5 lesions, any line, mostly ER+/HER2- first line
35.8 vs 20.4 mo, HR 0.48
95% CI 0.25-0.91, p=0.021
TL;DRmPFS 35.8 vs 20.4mo, HR 0.48 (0.25-0.91), p=0.021 for MDT to all lesions in oligometastatic breast, QoL non-inferior.
The RT read is who was actually irradiated: 2/3 of lesions were bone and >80% of pts had 1-3 mets, so this is largely bone-directed ablative RT in first-line ER+ disease, not a visceral-oligomet population. Dose and fractionation are not reported in source, which gates transfer to practice. QoL non-inferiority at 12wk (-2.1, margin -10) removes the main argument against adding local therapy to a working systemic backbone.
+3 more figures
| Arm | QLQ-C30 mean at 12wk (95% CI) | Between-group change (ANCOVA) |
|---|---|---|
| Experimental | 72.2 (67.2-77.2) | -2.1 (-9.2-5.1) |
| Control | 74.3 (69.3-79.3) | n/a |
9 details 5 trials watching
Randomised trial (ARO-2021-09, NCT04495309) of systemic therapy alone vs systemic therapy plus local ablative radiotherapy to all metastatic lesions. Randomisation stratified by type of systemic therapy and treatment line. N=87 (43 experimental, 44 control).
Metastatic breast cancer, any treatment line, maximum 5 metastatic lesions, with the systemic regimen determined by multidisciplinary tumour board. Pts requiring palliative RT to all metastases were not eligible, though palliative RT to symptomatic sites was allowed. Median age 58 / 59; ECOG 0 in 76.7% of the experimental arm.
The intervention is local ablative radiotherapy to all metastatic lesions on top of the systemic backbone. Dose, fractionation, modality, and target-volume definition are not reported in the source slides, and 2/3 of treated lesions were bone metastases.
Co-primary: progression-free survival and quality of life (EORTC QLQ-C30) at 12 weeks post-randomisation. Secondary: overall survival, toxicity, compliance, QLQ-C30 and QLQ-BR23, and patient satisfaction with cancer care (EORTC PATSAT C33).
Both co-primaries read out in favour of adding MDT: PFS separated at HR 0.48 and the QoL summary score met non-inferiority against a -10 point margin. See the figure captions for the arm-level values.
Recruitment stopped early at <20% of the initial and <40% of the amended target, leaving N=87 and a wide HR CI (0.25-0.91). Open-label design with a patient-reported co-primary. No OS data reported in source, and the toxicity secondary endpoint is likewise absent from the presented slides.
The presenter frames this as the first RCT showing a PFS benefit from MDT in oligometastatic breast cancer, extending the STOMP / SABR-COMET line of evidence into a histology where systemic control is comparatively good. Eight further randomised trials are accruing, so the magnitude here should be read as provisional.
Randomised but stopped early at <20% of initial accrual target; N=87 with wide HR CI (0.25-0.91). Underpowered for a durable PFS estimate.
In ER+/HER2- breast cancer with 1-3 mostly bony metastases on first-line systemic therapy, this supports discussing ablative RT to all lesions as a PFS-directed addition; it does not extend to >5 lesions, heavily visceral disease, or pts needing palliative RT to every site.
- Does the PFS benefit translate to overall survival n=340 · primary completion 2026-11 · JCOG phase 3 MDT vs systemic alone, 340 pts
- Which oligometastatic breast subgroups benefit most active Standard Treatment +/- SBRT in Solid Tumors Patients With Between 1 and 5 Bone-only Metastases Phase NAn=168 · primary completion 2025-07 · SBRT vs none in 1-5 bone-only mets, breast inclrecruiting BreCLIM-2 - A RCT Investigating Local Treatment for Breast Cancer Liver Metastases Phase 3n=200 · primary completion 2029-12 · RCT of local tx in 1-4 breast liver metsnot yet Adding Surgery and Radiation to the Usual Treatment for HER2-Positive Breast Cancer That Had Already Spread at Diagnosis Phase 3n=562 · primary completion 2032-05 · HER2+ de novo stage IV, 1-5 mets, SBRT added
- Optimal RT dose and fractionation for bone-dominant oligomet breast recruiting OligoCare TwiCs (Trials Within Cohorts) Trial Comparing Acute Toxicity in Single-fraction vs Multiple-fraction SBRT for Metastasis-directed Treatment (SPRINT) Phase NAn=302 · primary completion 2029-02 · single-fraction vs multifraction SBRT, breast incl
📚 Sources · 🐦 3 tweets
📌 Metastases-directed treatment in Patients with Oligometastatic Breast Cancer: Results from the OLIGOMA-trial (ARO-2021-09, NCT04495309) @DavidKrugMD 👏🏻 #ESTRO26 @ESTRO_RT @OncoAlert #OncoAlertAF pic.twitter.com/YDMef0fXRm
— Elisabetta Bonzano MD, PhD (@to_be_elizabeth) May 17, 2026
❗️ The OLIGOMA trial results just dropped at #ESTRO26 and they are massive. A 15-month improvement in median PFS for OMD breast cancer (HR = 0.48). This adds to the growing mountain of evidence that MDT (Metastasis-Directed Therapy) works. Lets’s go 🧵 1/n pic.twitter.com/5uiEVSYtdH
— NonsparseOncologist (@5_utr) May 17, 2026
Here are some details!
— Jeff Ryckman (@jryckman3) May 17, 2026
On OLIGOMA, nearly 3/4 were first line endocrine or chemotherapy. #ESTRO26 #OncTwitter@CJTsaiMDPhD pic.twitter.com/r3kJzNNsyK
EXTEND
ForOligometastatic solid tumors, mixed histology, on standard-of-care systemic…
TL;DRPrimary aggregated analysis across all tumor-histology baskets now published in JCO; no effect sizes reported in source tweet.
The aggregated all-basket read is the gate for whether MDT generalizes beyond the single histologies that carry their own randomized data, so it moves the offer-MDT-or-not decision in mixed-histology oligomet. No effect sizes, RT dose, fractionation, or target volume appear in the source text.
Also covered May 18
7 details
Phase II randomized trial of metastasis-directed therapy added to standard of care vs standard of care alone in oligometastatic solid tumors. This report is the primary analysis of all tumor-histology baskets pooled.
No effect sizes are reported in the source, which is a tweet plus a JCO title-page image. Primary endpoint, medians, HRs, and follow-up all require the full text.
Pooling across histology baskets can obscure heterogeneity between them. MDT technique, dose, fractionation, and target volume are not stated in source, so transferability to a specific RT practice cannot be judged here.
Phase II randomized basket design caps the read at hypothesis-generating; source gives no primary endpoint, effect size, or follow-up to classify further.
- Which histology baskets drive the pooled estimate
- Whether ctDNA selects pts who benefit from MDT
- Confirmatory phase 3 in mixed-histology oligomet
📚 Sources · 🐦 1 tweet
1/ Tremendous thanks to the patients, coauthors and all who made the EXTEND trial possible. The primary aggregated analysis is now available online @JCO_ASCO with ctDNA correlatives presented synchronously at @ESTRO_RT #ESTRO26 pic.twitter.com/Zoy8DGRWbW
— Alexander Sherry (@AlexSherryMD) May 17, 2026