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  • Title: Pathologic Outcomes of Gleason 6 Favorable Intermediate-Risk Prostate Cancer Treated With Radical Prostatectomy: Implications for Active Surveillance.
    Author: Yang DD, Mahal BA, Muralidhar V, Vastola ME, Boldbaatar N, Labe SA, Nezolosky MD, Orio PF, King MT, Martin NE, Mouw KW, Trinh QD, Nguyen PL.
    Journal: Clin Genitourin Cancer; 2018 Jun; 16(3):226-234. PubMed ID: 29196209.
    Abstract:
    BACKGROUND: The safety of active surveillance (AS) for Gleason 6 favorable intermediate-risk (FIR) prostate cancer is unknown. To provide guidance, we examined the incidence and predictors of upgrading or upstaging for Gleason 6 FIR patients treated with radical prostatectomy. PATIENTS AND METHODS: We identified 2807 men in the National Cancer Database diagnosed from 2010 to 2012 with Gleason 6 FIR disease (<50% positive biopsy cores [PBC] with either prostate-specific antigen [PSA] of 10-20 ng/mL or cT2b-T2c disease) treated with radical prostatectomy. Logistic regression was used to identify predictors of upgrading (Gleason 3+4 with tertiary Gleason 5 or Gleason ≥4+3) or upstaging (pT3-4/N1). RESULTS: Fifty-seven percent of the cohort had PSA of 10 to 20 ng/mL; 25.5% patients with PSA of 10 to 20 ng/mL and 12.4% with cT2b to T2c disease were upgraded or upstaged. In multivariable analysis, predictors of upgrading or upstaging included increasing age (P = .026), PSA (P = .001), and percent PBC (P < .001), and black race versus white (P = .035) for patients with PSA of 10 to 20 ng/mL and increasing PSA (P = .001) and percent PBC (P < .001) for patients with cT2b to T2c disease. Men with PSA of 15.0 to 20.0 ng/mL or 37.5% to 49.9% PBC with PSA of 10 to 20 ng/mL had >30% risk of upgrading or upstaging, whereas cT2b to T2c patients with <12.5% PBC or PSA <5.0 ng/mL had <10% risk. CONCLUSION: We found that Gleason 6 FIR patients with cT2b to T2c tumors had a low risk of harboring higher grade or stage disease and would be reasonable AS candidates, whereas patients with PSA of 10 to 20 ng/mL had a high risk and might generally be poor AS candidates.
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