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One of the greatest concerns among clinicians regarding testosterone replacement therapy (TRT) is the fear of causing or promoting prostate cancer. We evaluated prostatic changes in hypogonadal men with and without high grade prostatic intraepithelial neoplasia (PIN), which is considered a prostatic precancerous lesion, after 1 year of TRT.

A total of 75 hypogonadal who completed 12 months of TRT were studied. All underwent prostate biopsy prior to initiating treatment. Of the men 55 had benign prostate biopsies (PIN−) and 20 had PIN without frank cancer (PIN+). All men with PIN underwent repeat biopsy to exclude cancer prior to the initiation of testosterone treatment. Prostate specific antigen (PSA), and total and free testosterone were determined prior to treatment and at 1 year. Repeat biopsy was performed for a change noted on digital rectal examination or for a …