onc brain

About Β· curated by Nick Boehling, MD Β· @nb2276

2026-11-09

digest generated 2026-11-09

ASCO imaging guideline: NGI should be offered when salvage RT is contemplated after RP (evidence high, strong); withhold it when no salvage local therapy is planned.
A guidance-only day, no trial readouts. Prostate carried most: ASCO ties NGI to a salvage RT decision, an ESTRO ACROP Delphi reached consensus on only 14/40 salvage SBRT items, and an RSS case guide covers intact-prostate SBRT. Gyn: ABS HDR compendium keeps a cervix HR-CTV D90 goal of 85-95 Gy EQD210; ESGO/ESTRO/ESP backs universal MMR/MSI testing.

Gynecologic

ABS HDR fractionation reference plus the ESGO/ESTRO/ESP endometrial update; the endometrial source text cuts off before the adjuvant RT grades.

ESGO/ESTRO/ESP endometrial carcinoma guidelines

TL;DRJoint European guideline update: universal MMR IHC or MSI testing in all EC (III, B); molecular classification needs all four surrogate tests.

Why it mattersRadiation oncology

The molecular classification is valid only with all four tests (p53, MSH6, PMS2, POLE exonuclease domain), since ~5% of tumors carry multiple classifiers and a single surrogate misassigns them. That classification is reported as prognostic most clearly in high-grade and high-risk tumors, the group where adjuvant decisions are made; the RT recommendations themselves fall outside the captured excerpt.

Monday clinic

In any newly diagnosed endometrial carcinoma, whatever the histologic subtype, this supports MMR IHC or MSI testing to triage Lynch referral (III, B); MMRd alone does not identify a germline carrier, since most cases are sporadic.

11 details

Joint ESGO/ESTRO/ESP guideline updating the 2014 European consensus. MEDLINE review of Jan 2014 to June 2019; recommendations graded on an adapted IDSA-USPHS scale (levels I-V, grades A-E), with 191 external reviewers and patient input.

Universal MMR IHC or MSI in all EC regardless of histology (III, B), with MLH1 promoter methylation testing when MLH1/PMS2 is lost. Lynch surveillance generally from age 35 and risk-reducing hysterectomy + BSO preferably before 40 (IV, B).

RecommendationLevel, grade
Multidisciplinary tumor board planning of staging and treatmentV, A
Treatment in a specialized center, esp. high-risk or advanced stageV, A
MMR IHC (+ MLH1 promoter methylation) or MSI in all EC, any histologyIII, B
Genetic counseling if increased Lynch riskIII, B
Lynch endometrial surveillance generally from age 35, tailoredIV, B
Annual TVUS + annual or biennial biopsy until hysterectomy in Lynch carriersIV, B
Hysterectomy + BSO after childbearing, preferably before age 40IV, B
GeneEndometrial carcinomaOvarian cancer
MLH134%11%
MSH251%15%
MSH649%0%
PMS224%0%

The molecular surrogate algorithm (p53, MSH6, PMS2, POLE) is endorsed only as a complete panel, because ~5% of tumors are multiple classifiers. POLEmut status requires a pathogenic variant in the exonuclease domain.

women with endometrial carcinoma of any histology and Lynch syndrome mutation carriers
Does not represent heterozygous PMS2 carriers for gynecological surveillance, whose absolute risk the guideline calls very low.

Literature search stopped at June 2019 and was English-only. The captured excerpt ends before the adjuvant therapy section, so RT and systemic recommendations are not reported in source text.

  • Role of L1CAM or CTNNB1 in low-grade NSMP endometrioid carcinoma
  • Optimal gene-specific surveillance start age in Lynch carriers

Sourced from Concin, Nicole et al.

πŸ“š Sources Β· πŸ“„ 1 paper
πŸ“„ PAPER Concin, Nicole; Matias-Guiu, Xavier; Vergote, Ignace et al. Β· International Journal of Gynecological Cancer (2021-01)
ESGO/ESTRO/ESP guidelines for the management of patients with endometrial carcinoma

ABS compendium of gynecologic HDR brachytherapy fractionation

TL;DRCervix HR-CTV D90 goal 85-95 Gy EQD210; no single optimal HDR scheme for any site; doses >7 Gy/fx flagged for higher complication risk.

Trials discussed

Portec-2EMBRACE

Why it mattersRadiation oncology

The EMBRACE-derived OAR limits sit below the ABS ones (rectal D2cc ≀65 vs 70-75 Gy, bladder ≀80 vs about 80-90 Gy EQD23), and the panel says lower doses are recommended in practice. For cuff brachy the panel picks no scheme. It flags that 0.5 cm-depth prescriptions need modifying on a 2.5 cm cylinder to keep surface dose acceptable. The longer read

12 details 1 trial watching

ABS Gynecologic Cancer Task Force compendium (Brachytherapy 2019). Experts reviewed the literature, the existing ABS guidelines and their own clinical experience, then reached consensus over conference calls. Not a systematic review.

All schemes are given as EQD210 for tumor and EQD23 for OAR, so regimens can be summed and compared. Cervix image-guided target: HR-CTV D90 85-95 Gy EQD210, starting from the Point A schedules and then optimized. Interstitial needle loading should hold no more than 10-20% of total dwell time.

The cervix target range and the tighter OAR limits (rectal D2cc ≀65 Gy, bladder ≀80 Gy) come from EMBRACE, not the older ABS 2012 Point A guidance. For the cuff, Portec-2 and institutional series supply the schedules, and Sorbe is the only randomized comparison of fractionation.

HDR brachy for intact cervix, post-op endometrial cuff, vaginal cancer or recurrence, and medically inoperable stage I uterine cancer
Does not represent LDR or PDR practice, or risk-adapted dose painting beyond HR-CTV, which the authors leave undetailed.

Several of the source tables could not be reliably paired row-to-value here, so specific scheme-to-EQD2 mappings for Point A, interstitial and inoperable uterine schedules are not reproduced. The cervix Point A schedules derive from 2012 ABS guidance and are pre-optimization starting points.

The document is a reference list of what is acceptable, not a ranking. Its practical value is the EQD2 bookkeeping and the explicit caution on >7 Gy/fx. It leaves open which cuff scheme is best and how to load newer free-trajectory interstitial applicators.

SettingTargetDose goal
Intact cervix, image-guidedHR-CTV D9085-95 Gy (90-95 Gy for larger tumors)
Inoperable stage I uterine, HDR aloneUterine CTV / GTV48-62.5 Gy / 80-90 Gy
Inoperable stage I uterine, EBRT + HDRUterine CTV / GTV65-75 Gy / 80-90 Gy
Post-op vaginal cuff boost after EBRTVaginal surface (LDR equivalent)65-70 Gy; 70-75 Gy for superficial positive margins
Vaginal recurrence of uterine cancerVaginal lesionat least 75 Gy EQD2 (LDR equivalent)
OARABS limitEMBRACE-derived
Rectum/sigmoid D2cc70-75 Gy≀65 Gy (rectum)
Bladder D2ccapproximately 80-90 Gy≀80 Gy
RankRegimenPrescription point
17 Gy x 30.5 cm depth
26 Gy x 5Vaginal surface
35.5 Gy x 4 and 5 Gy x 50.5 cm depth
47.5 Gy x 5Vaginal surface
EBRTHDR boost
45 Gy/25 fx5-6 Gy x 3 (to surface)
50.4 Gy/28 fx6 Gy x 2 (to surface)
  • Optimal vaginal cuff HDR fractionation scheme
  • Outcomes of 3-fraction vs 4-5 fraction cervix HDR
    n=41 Β· primary completion 2028-06 Β· phase 2 3-fx vs standard 4-fx HDR, definitive cervix
  • Loading patterns for newer interstitial applicators

Sourced from Albuquerque, Kevin et al.

πŸ“š Sources Β· πŸ“„ 1 paper
πŸ“„ PAPER Albuquerque, Kevin; Hrycushko, Brian A.; Harkenrider, Matthew M. et al. Β· Brachytherapy (2019-07)
Compendium of fractionation choices for gynecologic HDR brachytherapyβ€”An American Brachytherapy Society Task Group Report

Prostate

Three guidance documents, all expert opinion or detection data rather than outcome data: NGI before salvage RT post-RP, the unresolved dose and constraint questions in salvage SBRT, and intact-gland SBRT in large or post-TURP prostates.

Radiosurgery Society guide to localized prostate SBRT

TL;DRCase-based RSS guide to intact-prostate SBRT (≀5 fx): large gland, high baseline IPSS and prior TURP are not contraindications if OAR constraints are met.

Trials discussed

PACE-BMIRAGE

Why it mattersRadiation oncology

The useful RT detail is the prescription spread: 100% isodose with V105% < 20-30% vs 75-85% isodose with Dmax 130-140%, which makes cross-center dose comparisons unreliable. On gland size, PACE-B had only 5% of pts β‰₯80 mL, so offering SBRT to large glands rests on retrospective data plus spacer and bladder filling.

Monday clinic

In a pt with a large prostate, high baseline IPSS or prior TURP, this guide supports offering SBRT with counselling on a harder transient GU flare when OAR constraints are achievable; it does not support neoadjuvant ADT for cytoreduction alone. The longer read

8 details 2 trials watching

Case-based practical guide endorsed by the Radiosurgery Society, built on two modified real-world cases. Expert synthesis of existing evidence, not a trial or systematic review.

Both cases 40 Gy in 5 fractions to prostate + proximal SV; Case B added an MR-guided SIB of 42 Gy to the dominant intraprostatic lesion. Case A prescribed to the 100% isodose covering PTV, limiting V105% (42 Gy) < 20-30%, with hydrogel spacer and QOD delivery.

Large prostate is not a contraindication if OAR constraints are met; spacer and bladder filling help, and neoadjuvant ADT purely for cytoreduction is discouraged. Pts with baseline IPSS β‰₯15 had low G3 GU toxicity with prophylactic Ξ±1-antagonists but should be counselled on a harder transient flare.

PACE-B is the reference trial but enrolled few large glands (5% β‰₯80 mL) and allowed prior TURP. MIRAGE (NCT04384770) is cited for MR guidance reducing toxicity.

Case A's own neoadjuvant ADT shrank the gland from 112 to 61 mL, so it does not test SBRT on an untreated large gland. Whether large-gland GU risk is specific to SBRT fractionation remains unresolved pending PACE-B subgroup analyses.

ApproachPrescriptionHot spot handling
100% isodoseCovers CTV or PTV, goal 95-99% receiving RxCase A limited V105% (42 Gy) < 20-30%
Robotic-style75-85% isodose covering PTVDmax 130-140% of Rx; inhomogeneity deliberately allowed

Sourced from Ma, Ting Martin et al.

πŸ“š Sources Β· πŸ“„ 1 paper
πŸ“„ PAPER Ma, Ting Martin; Ladbury, Colton; Tran, Maxwell et al. Β· Practical Radiation Oncology (2024-03)
Stereotactic Body Radiation Therapy: A Radiosurgery Society Guide to the Treatment of Localized Prostate Cancer Illustrated by Challenging Cases

ESTRO ACROP Delphi: salvage SBRT for intraprostatic relapse

TL;DRConsensus on only 14/40 items (35%) after 3 Delphi rounds; dose, fractionation, biopsy need and cumulative OAR constraints remain unresolved.

Trials discussed

NRG/RTOG 0526MASTERPICTUREPROLAPSE

Why it mattersRadiation oncology

The dosimetric section, at Kendall's W 0.12, is where the panel agreed least: no consensus on salvage dose relative to primary, fractionation, or cumulative rectum/bladder limits. What it does fix is the target and sequencing: focal CTV of mpMRI GTV plus an adaptive margin, no concurrent ADT, and a 2-year minimum interval from primary RT.

Monday clinic

In an M0, ECOG 0-1 man with intraprostatic relapse β‰₯2 years after primary RT, this expert opinion supports focal SBRT without concurrent ADT as a reasonable option; it does not tell you the dose, fractionation, cumulative OAR limits, or whether imaging alone can stand in for biopsy. The longer read

9 details 1 trial watching

ESTRO ACROP Delphi consensus, 40-item questionnaire in 3 rounds (Jul 22 to Dec 16, 2019). Items with >80% agreement were retired as consensus; an EAU-nominated urologist sat on the reviewing committee.

Panel of 18 of 33 invited authors of salvage SBRT papers (54.5%), all completing every round. 12/18 work in centres treating >2,000 pts/yr; only 2 practise outside Europe.

Consensus on a focal CTV (mpMRI GTV + adaptive margin), dose prescribed to the isodose, and no concomitant ADT. Schedules in use were 5-6 fx up to about 35 Gy, but the panel did not agree on a recommended fractionation or on dose relative to the primary course.

14/40 items reached consensus (35%), half of them in round 1; consensus or major agreement on 27/40 (68%). Agreement was highest for imaging/staging (W 0.34) and lowest for dosimetry (W 0.12).

SectionConsensus itemsKendall's WAgreement
Patient selection6/190.17Weak
Imaging + biopsy3/70.34Moderate
Dosimetry (CTV + OARs)5/140.12Very weak

The Uro-GEC-ESTRO salvage brachytherapy Delphi split on whole-gland vs focal targets and mandated histology; this panel agreed on focal GTV-based CTV but split on biopsy. The Italian AIRO PROLAPSE survey leaned toward concurrent ADT, which this panel rejected.

intraprostatic relapse after prior definitive prostate RT, metastatic disease excluded, ECOG 0-1
Does not represent prostate-bed recurrence after RP or nodal/distant relapse.

Rounds closed before most PSMA-PET data appeared, so the 28% PSMA-PET endorsement is dated. Panellists were selected as authors of the mostly retrospective, short-follow-up series the consensus draws on, which risks circular endorsement.

The unresolved items (biopsy, dose, cumulative OAR constraints) are the ones a prospective protocol has to fix first. The ongoing trials cited already disagree with each other on interval (2 vs 4 yr) and on whole-gland vs partial CTV.

Sourced from Jereczek-Fossa, Barbara A. et al.

πŸ“š Sources Β· πŸ“„ 1 paper
πŸ“„ PAPER Jereczek-Fossa, Barbara A.; Marvaso, Giulia; Zaffaroni, Mattia et al. Β· Cancer Treatment Reviews (2021-07)
Salvage stereotactic body radiotherapy (SBRT) for intraprostatic relapse after prostate cancer radiotherapy: An ESTRO ACROP Delphi consensus

ASCO guideline: imaging for advanced prostate cancer

TL;DRNGI should be offered when salvage RT is contemplated after RP (evidence high, strong). Withhold it when no salvage local therapy is planned.

Why it mattersRadiation oncology

The only high-evidence, strong recommendation is NGI before contemplated salvage RT after RP (4.4), and Habl et al reported 59% of RT plans changed by 68Ga-PSMA PET/CT. Post-RT rising PSA without salvage intent gets the opposite call (4.5), so imaging should follow the salvage decision, not precede it.

Monday clinic

In post-RP rising PSA with negative conventional imaging where salvage RT is on the table, this supports NGI first; it does not support NGI for men not candidates for, or unwilling to receive, salvage therapy. The longer read

9 details 2 trials watching

ASCO expert panel with ASTRO, AUA, SNMMI, ACR, SAR and SUO. Systematic review 2013 to Aug 2018, 35 studies: 17 systematic reviews Β± meta-analysis and 18 primary articles.

Men with advanced prostate cancer: newly diagnosed clinical high-risk, suspected or confirmed metastatic, recurrent, or progressive on treatment, including nonmetastatic CRPC and metastatic CRPC.

For men in whom salvage radiotherapy is contemplated, NGI should be offered (Rec 4.4; evidence high, strength strong). Habl et al reported 59% RT plan changes from 68Ga-PSMA PET/CT.

Conventional imaging (CT, bone scan, prostate MRI) and/or NGI per scenario. NGI is not offered absent salvage intent after RP (4.3) or RT (4.5), and not routinely offered for radiographic progression in mCRPC (4.11).

ScenarioNGI recommendationEvidence qualityStrength
Rising PSA post-RP, neg conventional imaging, no salvage planned (4.3)Should not be offeredLowModerate
Rising PSA post-RP, salvage RT contemplated (4.4)Should be offeredHighStrong
Rising PSA post-RT, salvage not planned (4.5)Should not be offered, except IRB trialIntermediateModerate
Rising PSA post-RT, salvage local/regional therapy contemplated (4.6)Supported; may guide managementIntermediateModerate
Hormone-sensitive, metastatic on conventional imaging (4.7)Potential role to clarify burdenIntermediateModerate
Nonmetastatic CRPC (4.8)Only if care change contemplatedWeakModerate
Metastatic CRPC, PSA progression (4.9)Conventional imaging; PSA alone not reason to switchIntermediateStrong
Metastatic CRPC, high suspicion, neg conventional imaging (4.10)Could be contemplated, ideally trialInsufficientWeak
Metastatic CRPC, radiographic progression on conventional imaging (4.11)Not routinely offeredInsufficientModerate

Evidence is drawn from detection-rate and diagnostic-accuracy meta-analyses of choline, fluciclovine, acetate and 68Ga-PSMA PET. It contains no randomized trial of NGI-guided treatment with clinical outcome endpoints.

men with advanced prostate cancer where imaging informs salvage or systemic decisions
Does not represent men with no planned change in management, where NGI is advised against.

Literature closes Aug 2018, before the prospective PSMA PET era matured. Much of the recommendation set is informal consensus with benefits/harms ratio uncertain.

The guideline makes imaging conditional on a salvage or care-change decision, not a reflex to rising PSA. It does not settle whether NGI-driven stage migration improves outcomes, especially for oligometastatic MDT selection (4.7).

Sourced from Trabulsi, Edouard J. et al.

πŸ“š Sources Β· πŸ“„ 1 paper
πŸ“„ PAPER Trabulsi, Edouard J.; Rumble, R. Bryan; Jadvar, Hossein et al. Β· Journal of Clinical Oncology (2020-06)
Optimum Imaging Strategies for Advanced Prostate Cancer: ASCO Guideline
Abstract
PURPOSE Provide evidence- and expert-based recommendations for optimal use of imaging in advanced prostate cancer. Due to increases in research and utilization of novel imaging for advanced prostate cancer, this guideline is intended to outline techniques available and provide recommendations on appropriate use of imaging for specified patient subgroups. METHODS An Expert Panel was convened with members from ASCO and the Society of Abdominal Radiology, American College of Radiology, Society of Nuclear Medicine and Molecular Imaging, American Urological Association, American Society for Radiation Oncology, and Society of Urologic Oncology to conduct a systematic review of the literature and develop an evidence-based guideline on the optimal use of imaging for advanced prostate cancer. Representative index cases of various prostate cancer disease states are presented, including suspected high-risk disease, newly diagnosed treatment-naΓ―ve metastatic disease, suspected recurrent disease after local treatment, and progressive disease while undergoing systemic treatment. A systematic review of the literature from 2013 to August 2018 identified fully published English-language systematic reviews with or without meta-analyses, reports of rigorously conducted phase III randomized controlled trials that compared β‰₯ 2 imaging modalities, and noncomparative studies that reported on the efficacy of a single imaging modality. RESULTS A total of 35 studies met inclusion criteria and form the evidence base, including 17 systematic reviews with or without meta-analysis and 18 primary research articles. RECOMMENDATIONS One or more of these imaging modalities should be used for patients with advanced prostate cancer: conventional imaging (defined as computed tomography [CT], bone scan, and/or prostate magnetic resonance imaging [MRI]) and/or next-generation imaging (NGI), positron emission tomography [PET], PET/CT, PET/MRI, or whole-body MRI) according to the clinical scenario.