Long-term multicentre experience of adjuvant radiotherapy for pN3 squamous cell carcinoma of the penis.

OBJECTIVE: To present the long-term adjuvant radiotherapy outcomes of patients with pN3 squamous cell carcinoma of the penis (SCCp) treated at two UK centres. PATIENTS AND METHODS: We conducted a retrospective audit of all pN3 SCCp patients, deemed suitable for adjuvant therapy by a specialist multidisciplinary team at St George's and Leeds Hospitals, who received adjuvant radiotherapy. Primary outcomes were recurrence-free survival (RFS), cancer-specific survival (CSS) and overall survival (OS). Secondary outcomes were time to adjuvant treatment, frequency of in-field recurrence, site and side of recurrence, and dose and schedule of radiotherapy. RESULTS: A total of 146 patients were included: 121 completed radiotherapy, 4 did not complete radiotherapy and 21 did not start it. The median (interquartile range [IQR]) age was 59 (54-70)years. The 5-year RFS was 51%, CSS was 51% and OS was 44%. Adjuvant radiotherapy was started at a median (IQR) of 75 (48-106) days. A dose of 45 Gy in 20 fractions was most commonly used. Of the 125 patients who started adjuvant treatment, 55 relapsed. Of these relapses, 30 occurred in an inguinal or pelvic nodal station and 26 of the 30 were in a radiation field. Relapses in 18 of the 55 cases were in visceral sites only and seven were in both nodal (non-irradiated sites) and visceral sites. Doses of <50 Gy were used more commonly before 2013 and higher doses (>50 Gy) were more commonly used after 2013. CONCLUSIONS: Application of a standard radiotherapy protocol within a centralized supra-network setting has achieved survival outcomes that would appear better than those previously documented for either radiotherapy or chemotherapy in a cohort with solely pN3 disease. The addition of adjuvant chemotherapy may improve these outcomes further. These data suggest that adjuvant radiotherapy has a role to play in the management of men with pN3 SCCp.

A Workflow to Improve the Alignment of Prostate Imaging with Whole-mount Histopathology.

RATIONALE AND OBJECTIVES: Evaluation of prostate imaging tests against whole-mount histology specimens requires accurate alignment between radiologic and histologic data sets. Misalignment results in false-positive and -negative zones as assessed by imaging. We describe a workflow for three-dimensional alignment of prostate imaging data against whole-mount prostatectomy reference specimens and assess its performance against a standard workflow. MATERIALS AND METHODS: Ethical approval was granted. Patients underwent motorized transrectal ultrasound (Prostate Histoscanning) to generate a three-dimensional image of the prostate before radical prostatectomy. The test workflow incorporated steps for axial alignment between imaging and histology, size adjustments following formalin fixation, and use of custom-made parallel cutters and digital caliper instruments. The control workflow comprised freehand cutting and assumed homogeneous block thicknesses at the same relative angles between pathology and imaging sections. RESULTS: Thirty radical prostatectomy specimens were histologically and radiologically processed, either by an alignment-optimized workflow (n = 20) or a control workflow (n = 10). The optimized workflow generated tissue blocks of heterogeneous thicknesses but with no significant drifting in the cutting plane. The control workflow resulted in significantly nonparallel blocks, accurately matching only one out of four histology blocks to their respective imaging data. The image-to-histology alignment accuracy was 20% greater in the optimized workflow (P < .0001), with higher sensitivity (85% vs. 69%) and specificity (94% vs. 73%) for margin prediction in a 5 × 5-mm grid analysis. CONCLUSIONS: A significantly better alignment was observed in the optimized workflow. Evaluation of prostate imaging biomarkers using whole-mount histology references should include a test-to-reference spatial alignment workflow.

Transperineal sector prostate biopsies: a local anesthetic outpatient technique.

OBJECTIVE: To describe our technique and determine the feasibility and tolerability of transperineal template prostate (TP) biopsies under local anesthesia (LA). METHODS: Fifty consecutive patients underwent TP biopsies under LA for investigation of an elevated prostate-specific antigen level or risk stratification as part of our active surveillance protocol. Tolerability was evaluated with a visual analog scale assessing probe discomfort, LA infiltration, and the biopsy procurement. Patients were also asked if they would have the procedure again, and in those who had undergone previous transrectal biopsies, how the TP technique compared. Pathologic data, clinical outcomes, and complications were recorded at 2 weeks. RESULTS: Mean age was 62.8 years (standard deviation [SD], 6.34 years) and the mean prostate-specific antigen level was 8.49 ng/mL (SD, 6.36 ng/mL). Mean prostate volume was 48.2 mL (SD, 19.4 mL). Mean visual analog scale scores for discomfort caused by the ultrasound probe, LA injections, and biopsies were 3.08 (SD, 1.64), 3.29 (SD, 1.13), and 2.88 (SD, 1.28), respectively. Thirty-four of 50 men (68%) had positive histology, 26 men had Gleason score≤3+4, 5 men had Gleason score≥4+3, and 3 had recurrent adenocarcinoma after radiotherapy. There were 2 complications: 1 Clavien score 1 and 1 Clavien score 3a. CONCLUSION: LA TP biopsies are well tolerated, acceptable, and feasible when carried out within an outpatient setting.

Indications, results and safety profile of transperineal sector biopsies (TPSB) of the prostate: a single centre experience of 634 cases.

OBJECTIVE: To describe a protocol for transperineal sector biopsies (TPSB) of the prostate and present the clinical experience of this technique in a UK population. PATIENTS AND METHODS: A retrospective review of a single-centre experience of TPSB approach was undertaken that preferentially, but not exclusively, targeted the peripheral zone of the prostate with 24-38 cores using a 'sector plan'. Procedures were carried out under general anaesthetic in most patients. Between January 2007 and August 2011, 634 consecutive patients underwent TPSB for the following indications: prior negative transrectal biopsy (TRB; 174 men); primary biopsy in men at risk of sepsis (153); further evaluation after low-risk disease diagnosed based on a 12-core TRB (307). RESULTS: Prostate cancer was found in 36% of men after a negative TRB; 17% of these had disease solely in anterior sectors. As a primary diagnostic strategy, prostate cancer was diagnosed in 54% of men (median PSA level was 7.4 ng/mL). Of men with Gleason 3+3 disease on TRB, 29% were upgraded and went on to have radical treatment. Postoperative urinary retention occurred in 11 (1.7%) men, two secondary to clots. Per-urethral bleeding requiring hospital stay occurred in two men. There were no cases of urosepsis. CONCLUSIONS: TPSB of the prostate has a role in defining disease previously missed or under-diagnosed by TRB. The procedure has low morbidity.