Can focal therapy impact perioperative, oncological, and functional outcomes in men who underwent focal therapy salvage robotic-assisted radical prostatectomy? A retrospective matched-pair comparative study.

76 Background: Salvage surgery is an option for recurrent prostate cancer(PCa) after focal therapy(FT). This is the first study to assess the impact of FT on surgical outcomes comparing salvage robotic-assisted radical prostatectomy(S-RARP) versus primary-RARP(P-RARP). We aimed to compare the impact of FT on perioperative, oncological and functional outcomes in men underwent S-RARP versus P-RARP. Methods: Prospective data of 2775 men underwent RARP for localized PCa from 2000 to 2016 were reviewed. Twenty-five men underwent S-RARP after FT failure(S-RARP group). Total 2750 underwent RARP as primary treatment. Matched-pair 1:2 selection of 44 out of 2750 patients by age, IPSS and IIEF5 defined P-RARP group. Primary endpoint was between-groups differences on functional outcomes. Secondary endpoint was oncological data. p < 0.05 was significant. Results: Surgical time, transfusion and complication rates were comparable(p > 0.05). Rates of continence probability[49.5%(SE 0.13) versus 62.4%(SE 0.08), p = 0.8 and 73%(SE 0.14) versus 76.5%(SE 0.07), p = 0.8, at 1 and 2 years, respectively] and the chance for achieving continence[HR 1.062, 95%CI 0.54-2.08, p = 0.861] were comparable between-groups. Potency recovery was significant lower on S-RARP[3±2 versus 9.22±6.55, p = 0.008]. S-RARP showed significant lower rates of cumulative BCR-free survival probability[67.6%(SE 0.12) versus 95.1%(SE 0.03), p = 0.001 and 56.3%(SE 0.15) versus 92.4%(SE 0.04), p = 0.001, at 1 and 2 years, respectively]. S-RARP presented significant increased risk of BCR[HR 4.8, 95%CI 1.67-13.76, p = 0.004]. Upstaging was an independent predictor factor for BCR on S-RARP[HR 14.65, 95%CI 1.46-146.37, p = 0.022] (Table 1). Conclusions: Salvage-RARP following FT failure is feasible and safe with acceptable complications rates. Patients assigned to FT should be previously advised about lower erectile recovery rates in case of a salvage surgery. Urologists may be warned about the risk of undertreatment in patients presenting failure along FT follow-up.