Concordance of confirmatory prostate biopsy in active surveillance with national guidelines: An analysis from the multi-institutional PURC cohort.

PURPOSE: National Comprehensive Cancer Network (NCCN) guidelines recommend confirmatory biopsy within 12 months of active surveillance (AS) enrollment. With <10 cores on initial biopsy, re-biopsy should occur within 6 months. Our objective was to determine if patients on AS within practices in the Pennsylvania Urologic Regional Collaborative (PURC) receive guideline concordant confirmatory biopsies. MATERIALS AND METHODS: Within PURC, a prospective collaborative of diverse urology practices in Pennsylvania and New Jersey, we identified men enrolled in AS after first biopsy, analyzing time to re-biopsy and factors associated with various intervals of re-biopsy. RESULTS: In total, 1,047 patients were enrolled in AS for a minimum of 12 months after initial biopsy. Four hundred seventy-seven (45%) underwent second biopsy at 1 of the 9 PURC practices. The number of patients undergoing re-biopsy within 6 months, 6 to 12 months, 12 to 18 months, and >18 months was 71 (14%), 218 (45.7%), 134 (28%), and 54 (11%), respectively. Sixty percent underwent confirmatory biopsy within 12 months. On multivariate analysis, re-biopsy interval was associated with number of positive cores, perineural invasion, and practice ID (all P < 0.05). Adjusted multivariable regression did not identify factors predictive of re-biopsy interval. CONCLUSION: Of patients who underwent confirmatory biopsy at PURC practices, 60.5% were within 12 months per NCCN guidelines. This suggests area for improvement in guideline adherence after enrollment in AS. All practices that offer AS should periodically perform similar analyses to monitor their performance. In an era of value-based care, adherence to guideline based active surveillance practices may eventually comprise national quality metrics affecting provider reimbursement.

Active Surveillance as Initial Management of Newly Diagnosed Prostate Cancer: Data from the PURC.

PURPOSE: We describe contemporary active surveillance utilization and variation in a regional prostate cancer collaborative. We identified demographic and disease specific factors associated with active surveillance in men with newly diagnosed prostate cancer. MATERIALS AND METHODS: We analyzed data from the PURC (Pennsylvania Urologic Regional Collaborative), a cooperative effort of urology practices in southeastern Pennsylvania and New Jersey. We determined the rates of active surveillance among men with newly diagnosed NCCN® (National Comprehensive Cancer Network®) very low, low or intermediate prostate cancer and compared the rates among participating practices and providers. Univariate and multivariable analyses were used to identify factors associated with active surveillance utilization. RESULTS: A total of 1,880 men met inclusion criteria. Of the men with NCCN very low or low risk prostate cancer 57.4% underwent active surveillance as the initial management strategy. Increasing age was significantly associated with active surveillance (p <0.001) while adverse clinicopathological variables were associated with decreased active surveillance use. Substantial variation in active surveillance utilization was observed among practices and providers. CONCLUSIONS: More than 50% of men with low risk disease in the PURC collaborative were treated with active surveillance. However, substantial variation in active surveillance rates were observed among practices and providers in academic and community settings. Advanced age and favorable clinicopathological factors were strongly associated with active surveillance. Analysis of regional collaboratives such as the PURC may allow for the development of strategies to better standardize treatment in men with prostate cancer and offer active surveillance in a more uniform and systematic fashion.

Contemporary evaluation of the National Comprehensive Cancer Network prostate cancer risk classification system.

OBJECTIVE: To analyze the National Comprehensive Cancer Network prostate cancer guidelines pretreatment risk groups in a contemporary series of patients treated with radical prostatectomy. METHODS: We analyzed our institutional radical prostatectomy database, including all patients with clinically localized disease treated from 2000 to 2010. Using the National Comprehensive Cancer Network guidelines, the patients were classified into low-, intermediate-, or high-risk groups. The pathologic outcomes were assessed, and the biochemical recurrence (BCR)-free survival rates were calculated and compared using the log-rank test and Cox proportional hazards analysis. RESULTS: A total of 12 821 men met the inclusion criteria. The pathologic and 10-year BCR-free survival rates differed significantly by risk group (low risk, 92.1%; intermediate risk, 71.0%; and high risk, 38.8%; P < .01). Among the intermediate-risk men, the 10-year BCR-free survival was significantly greater for men assigned to the intermediate-risk group by clinical stage (88.8%) than for those deemed intermediate risk by the Gleason score (73.6%) or prostate-specific antigen (PSA) level (79.5%; P = .01). Likewise, in the high-risk men, a trend was seen toward improved 5-year BCR-free survival for patients with clinical stage T3a tumors (77.8%) compared with those considered high risk because of the Gleason score (53.7%) or PSA level (41.0%; P = .13). On multivariate analysis, clinical stage, Gleason score, and PSA level were all significantly associated with BCR. CONCLUSION: We observed heterogeneous outcomes among patients within the National Comprehensive Cancer Network intermediate- and high-risk groups. The BCR-free survival rates were superior for men with an advanced clinical stage compared with those with an advanced Gleason score or elevated PSA level. This within-group heterogeneity must be considered when choosing the treatment modality and predicting an individual patient's prognosis.

Omega-3 fatty acids, genetic variants in COX-2 and prostate cancer.

Dietary intake of fish and omega-3 polyunsaturated fatty acids (omega-3 PUFAs) may decrease the risk of prostate cancer development and progression to advanced stage disease. This could reflect the anti-inflammatory effects of PUFAs, possibly through mediation of cyclooxygenase (COX), a key enzyme in fatty acid metabolism and inflammation. Despite promising experimental evidence, epidemiological studies have reported somewhat conflicting results regarding the effects of fish/PUFAs on prostate cancer development and progression. The literature suggests that fish, and particularly long-chain omega-3 PUFAs, may have a more pronounced protective effect on biologically aggressive tumors or on their progression, and less on early steps of carcinogenesis. Moreover, the impact of LC omega-3 PUFAs may be modified by variation of the COX-2 gene. Overall, results to date support the hypothesis that long-chain omega-3 PUFAs may impact prostate inflammation and carcinogenesis via the COX-2 enzymatic pathway.