Objectives: To assess the metastasis-free survival (MFS) and disease-specific survival (DSS) in men with Gleason score ≤6 prostate cancer at radical prostatectomy (RP).
Patients And Methods: We included 1101 consecutive RP patients operated between March 1985 to July 2013 at a single institution. The outcome variables were MFS and DSS. The postoperative survival was estimated by the Kaplan-Meier method.
Results: The Gleason score distribution of the study population (1101 patients) was Gleason score ≤6 (449, 41%), Gleason score 3 + 4 = 7 (436, 40%), Gleason score 4 + 3 = 7 (99, 9%) and Gleason score 8-10 (117, 11%). The median (interquartile range) postoperative follow-up was 100 (48-150) months. During follow-up 197 men (18%) died, of whom 42 (3.8%) died from prostate cancer-related causes. In all, 19/1101 patients (1.7%) had documented lymph node metastasis at the time of RP: none with Gleason score ≤6, seven with Gleason score 3 + 4 = 7 (1.6%), six with Gleason score 4 + 3 = 7 (6.1%) and six with Gleason score 8-10 (5.1%). Distant metastasis occurred in 56/1101 patients (5.1%): none with Gleason score ≤6, 23 with Gleason score 3 + 4 = 7 (5.3%), 17 with Gleason score 4 + 3 = 7 (17%) and 16 with Gleason score 8-10 (14%). Disease-specific death, stratified per Gleason-score group was: none in ≤6, 16 (3.7%) in 3 + 4 = 7, 16 (16%) in 4 + 3 = 7 and 10 (8.5%) in 8-10 group.
Conclusion: No metastasis or disease-specific death were seen in men with Gleason score ≤6 prostate cancer at RP, showing the negligible potential to metastasise in this large subgroup of patients with prostate cancer.
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