RT Journal Article SR Electronic T1 Preoperative PI-RADS v2.1 Scoring System Improves Risk Classification in Patients Undergoing Radical Prostatectomy JF Anticancer Research JO Anticancer Res FD International Institute of Anticancer Research SP 5705 OP 5712 DO 10.21873/anticanres.16776 VO 43 IS 12 A1 FUKUI, YUDAI A1 YAMADA, YASUTAKA A1 SAKAMOTO, SHINICHI A1 HORIKOSHI, TAKURO A1 ZHAO, XUE A1 SATO, KODAI A1 NANBA, SAKIE A1 KUBOTA, YOSHIHIRO A1 KANESAKA, MANATO A1 FUJIMOTO, AYUMI A1 SHIBATA, HIROKI A1 GOTO, YUSUKE A1 SAZUKA, TOMOKAZU A1 IMAMURA, YUSUKE A1 UNO, TAKASHI A1 ICHIKAWA, TOMOHIKO YR 2023 UL http://ar.iiarjournals.org/content/43/12/5705.abstract AB Background/Aim: The purpose of this study was to examine the prognostic value of Prostate imaging-reporting and data system (PI-RADS) v2.1 scoring system in patients who underwent radical prostatectomy (RP). Patients and Methods: Clinical data of 294 patients who received RP between 2006 and 2018 were reviewed and multiple parameters including PI-RADS v2.1 score were employed to identify predictive factors for biochemical recurrence (BCR). Tumor volume was calculated from prostatectomy specimens. Results: Median age at operation and initial PSA level were 67 years old and 7.68 ng/ml, respectively. 44.9 and 24.8% of patients were diagnosed with PI-RADS score 4 and 5 prior to biopsies, respectively. BCR was observed in 17% of patients and median observation period was 63.43 months. After multivariate analysis, PI-RADS v2.1 score 5 [hazard ratio (HR)=2.24, p=0.0124] was an independent predictive factor of BCR in addition to clinical T stage (≥2c) (HR=2.32, p=0.0093) and biopsy Gleason score (≥8) (HR=2.81, p=0.0007). Furthermore, PI-RADS score 5 significantly stratified the prognosis in D’Amico intermediate- and high-risk groups (p=0.0174 and p=0.0013, respectively). We established novel risk classifications including PI-RADS v2.1 score and found that prognostic capabilities were improved as compared to the D’Amico classification. Conclusion: The PI-RADS v2.1 score exhibited significant prognostic value in patients with localized prostate cancer following RP. Risk classifications based on PI-RADS v2.1 score might provide better ability for predicting oncological outcomes as compared to the D’Amico classification system.