Detecting Lower In Addition To The Highest Gleason Score Prostate Cancer On Core Biopsy And The Odds Of Upgrading At Radical Prostatectomy.

e16026 Background: We evaluated the odds of upgrading at radical prostatectomy when a biopsy core with a lower Gleason score (GS) compared to the core with the highest GS was present (ComboGS) versus not at diagnosis and in a concurrent submission, test ComboGS in a validation data set on the endpoint of prostate cancer-specific mortality. Methods: The study cohort consisted of 134 men with clinically localized PC diagnosed between 4/08 and 9/11 using a 12-core prostate needle biopsy. GS at biopsy and RP were assigned by an expert genitourinary pathologist. Logistic regression multivariable analysis (Table) was performed to assess the impact that ComboGShad on the odds of upgrading at RP adjusting for known predictors of upgrading. Results: Of 134 patients, 46 (34%) were upgraded. Both increasing percent positive biopsies (ppb) (p u003c 0.001) and PSA level (p=0.001) were associated with an increased odds of upgrading, whereas ComboGSwas associated with a decreased odds of upgrading (0.18 [95% CI: 0.04-0.76);...