Prostate-specific Membrane Antigen–radioguided Surgery in an EMBARK-like Cohort of Patients with Oligorecurrent Hormone-sensitive Prostate Cancer: Delay in Systemic Treatment
Bibliographic record
Abstract
We analyzed data for a cohort of 111 patients with EMBARK-like biochemical recurrence (BCR) of prostate cancer (prostate-specific antigen [PSA] doubling time ≤9 mo, PSA ≥1 ng/ml) after radical prostatectomy and localized oligorecurrence on prostate-specific membrane antigen (PSMA)-based imaging. All patients underwent PSMA-radioguided surgery (RGS). At PSMA-RGS, the median PSA was 1.95 ng/ml (interquartile range [IQR] 1.36-3.20) ng/ml and the median PSA doubling time was 4.0 mo (IQR 2.5-5.5). Clavien-Dindo grade >IIIa complications occurred in nine of 111 patients (8.1%). A complete biochemical response (cBR; PSA decline ≤0.2 ng/ml after PSMA-RGS) was observed in 53 patients (47.7%). In the cBR group (equivalent to the treatment suspension criterion in EMBARK), estimated survival rates at 2 yr were 49.9% (95% confidence interval [CI] 37.2-67.1%) for BCR-free survival and 65.2% (95% CI 52.2-81.4%) for treatment-free survival. A relevant proportion of our PSMA-RGS cohort with localized oligorecurrence on PSMA-based imaging fulfilled the EMBARK criteria. PSMA-RGS yielded meaningful biochemical responses that translated to long-lasting treatment-free periods. PATIENT SUMMARY: For some patients with prostate cancer and no evidence of metastasis on conventional imaging but high risk of metastatic progression, modern molecular imaging identifies small cancer deposits that can be removed via targeted surgery. This surgery led to a significant decrease in PSA (prostate-specific antigen) levels, which allowed a longer break from further treatment.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".