Fig. 4

Kaplan-Meier curve of BCR-free survival following radical prostatectomy of patients without any high-risk features. Mean survival of IDC-P[+] patients was 138 months (95% CI:108–169, median survival not yet reached), and mean survival of IDC-P[−] patients was 218 months (95% CI:202–234, median survival not yet reached). Log-rank testing P < 0.002. Abbreviations: IDC-P: intraductal carcinoma of the prostate. RP: radical prostatectomy. ART: adjuvant radiotherapy. High-risk features: Grade groups 4–5, seminal vesicle invasion, positive margins, extraprostatic extension