Marijuana Use History In Patients Presenting With Localized Prostate Cancer.

129Background: Determine the incidence of past marijuana use in a large cohort of men diagnosed with localized prostate cancer to determine if marijuana use was correlated with: patient age; pretreatment T stage; Prostate specific antigen (PSA); Gleason Score; or clinical risk group. Methods: From August, 2006 to October 2018, 4305 patients received treatment for localized prostate cancer and are included in an outcomes tracking protocol. All patients were requested to complete a pre treatment information form which included the question: “Have you ever used marijuana?” 4277 (97%) answered the question either affirmatively or negatively. Responses were stratified by: patient birth year; clinical T stage, PSA level; highest Gleason score; and clinical risk group. Results: 3.8% of men born before 1940 reported marijuana use compared to 17.4% born between 1940 and 1950 and 38.6% born after 1950 (pu003c0.0001). 19.8% of men with T1 tumors reported marijuana use compared to 18.1% of men with T2 tumors and 19.1% of...