Salvage High-Intensity Focused Ultrasound for Local Recurrence in the Prostatic Bed after Prostatectomy and Adjuvant or Salvage Radiotherapy: Preliminary Results.

PURPOSE: We sought to report the preliminary results of salvage high-intensity focused ultrasound for locally recurrent prostate cancer in the prostatic bed after radical prostatectomy and adjuvant or salvage radiotherapy. MATERIALS AND METHODS: We retrospectively analyzed a single-center cohort of men treated with salvage high-intensity focused ultrasound for locally recurrent prostate cancer after radical prostatectomy and adjuvant or salvage radiotherapy. All patients had a combination of choline positron emission tomography, multiparametric magnetic resonance imaging, and transrectal biopsies to confirm the local recurrence. Treatment failure was defined as persistent or recurrent prostate cancer in the prostatic bed and/or metastasis and/or introduction of systemic treatment. Progression was defined as metastasis and/or introduction of systemic treatment. Complications (Clavien-Dindo classification) and continence (Ingelman-Sundberg score) were evaluated. Kaplan-Meier analysis estimated oncological outcomes. RESULTS: Between July 2009 and November 2018, 22 patients were included; the median followup was 2.32 years. At 3 years, treatment failure-free survival rate was estimated to be 49.7% and progression-free survival rate 60.4%. Prostate specific antigen nadir ≤0.2 ng/ml was reached in 50% of the patients. A nadir of ≤0.2 ng/ml was significantly associated with better treatment failure-free and progression-free survival probabilities (p=0.003 and p=0.037, respectively). Grade III complications occurred in 6 patients (27.3%). Onset of grade II-III incontinence was significantly more frequent in cases of perianastomotic (36.4%) compared to retrovesical recurrence (0%; p=0.027). CONCLUSIONS: Salvage high-intensity focused ultrasound for locally recurrent prostate cancer after radical prostatectomy and salvage radiotherapy showed encouraging oncological results despite significant morbidity. The perianastomotic recurrence was linked to a higher risk of incontinence.

Salvage high-intensity focused ultrasound for locally recurrent prostate cancer after low-dose-rate brachytherapy: oncological and functional outcomes.

OBJECTIVES: To evaluate the oncological and functional outcomes of salvage high-intensity focused ultrasound (S-HIFU) for locally recurrent prostate cancer after low-dose-rate (LDR) brachytherapy. PATIENTS AND METHODS: Clinical phase II studies (2003-2015) included 50 consecutive patients with post-brachytherapy local recurrence treated by S-HIFU. S-HIFU was performed with post-external beam radiotherapy (EBRT) parameters and, since 2008, with specific post-brachytherapy parameters. Treatments were whole-gland ablation and, since 2009, hemi-ablation in cases of unilateral prostate cancer. The primary objective was to assess oncological outcomes: treatment failure-free survival, progression-free survival (PFS), overall survival (OS), cancer-specific survival (CSS), and metastasis-free survival (MFS) rates. The secondary objective was to evaluate adverse events, continence, and erectile function. Kaplan-Meier analysis estimated oncological outcomes. RESULTS: In all, 13 patients were treated with post-EBRT parameters, 37 with post-brachytherapy parameters, 35 with whole-gland treatment, and 15 with hemi-ablation. The median follow-up was 4.6 years. After S-HIFU, the median prostate-specific antigen level was 0.3 ng/mL. At 6 years, treatment failure-free survival, PFS, OS, CSS, and MFS rates were 41%, 45%, 93%, 98%, and 80%, respectively. Post-brachytherapy compared with post-EBRT parameters reduced Grade 2-3 incontinence (34% vs 62%, P = 0.015). Incontinence, bladder outlet obstruction and Grade ≥III complications were significantly reduced with hemi-ablation compared with whole-gland treatment (14% vs 54%, P < 0.001; 13% vs 46%, P = 0.03; 13% vs 63%, P = 0.001; respectively). Before S-HIFU, 25 patients had a five-item version of the International Index of Erectile Function score of ≥17, which was maintained in 48% at 12 months. CONCLUSION: S-HIFU for locally recurrent prostate cancer after LDR brachytherapy is associated with favourable survival rates at a price of significant morbidity. Dedicated post-brachytherapy parameters and hemi-ablation improve the safety of the treatment.