Objective To evaluate the relationships among Gleason score,clinical stage and total PSA,free-to-total prostate specific antigen ratio(f/tPSA)in patients with prostate cancer.

• 目的探讨前列腺癌病人血清PSA、f/tPSA(血清游离PSA与总PSA的比值)与前列腺癌Gleason评分、临床分期的相关性。