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Objectives: To evaluate the outcomes and prognosis of high-intensity focused ultrasound (HIFU) therapy for patients with localized prostate cancer, and identify suitable candidates for this therapy by investigating the predictive factors. Methods: The 224 patients (low 54, intermediate 111 and high-risk patients 59) with T1-2 stage were treated using the Sonablate device and followed for over 12 months after treatment. Recurrence was determined based on histological findings, prostate-specific antigen (PSA) failure and local or distant metastasis. The factors which are predicting variables with potential effects were investigated by Kaplan-Meier and multivariate analysis. Results: A total of 255 treatment sessions (193 with one, 31 with two) were performed. No patients died of prostate cancer, but 15 died of other causes and 14 patients were lost during follow-up. The 7-year recurrence-free survival (RFS) rates in all patients were 75%, and 5-year RFS rates were 98%, 84% and 59% in the low, intermediate and high-risk patients respectively. In the 216 patients who underwent histological examination at 6 months or later after HIFU, 25 (12%) were positive. In 77 patients with recurrence after first-HIFU, the second treatments were hormonal therapy and HIFU. Of the 31 patients who underwent a second HIFU, the 5-year RFS rates were 64%, and 5-year RFS rates were 100%, 74% and 33% in the low, intermediate and high-risk patients. The significant predictor for recurrence was risk-group, T-stage (T1 vs T2), Gleason score (≤3 + 4 and ≥4 + 3), pretreatment PSA (<10 vs ≥10 ng/ml) and nadir PSA (<0.1 vs ≥0.1 ng/ml). In 111 patients with intermediate-risk, T-stage and nadir PSA were significantly associated with outcomes. Conclusions: Prognosis of HIFU for Patients with localized prostate cancer was good, and the low and intermediate-risk patients with T1-staging are suitable indications for HIFU. Effective predictors for outcomes were risk-group, T-stage, Gleason score, pretreatment PSA and nadir PSA.

open journal of urology

Long-Term Outcomes and Prognosis of Transrectal High-Intensity Focused Ultrasound Therapy for Patients with Localized Prostate Cancer—Therapy after Recurrence and Predictive Factors