Serum testosterone as a biomarker for second prostatic biopsy in men with negative first biopsy for prostatic cancer and PSA>4ng/mL, or with PIN biopsy result

Vol. 42 (5): 925-931, September – October, 2016

doi: 10.1590/S1677-5538.IBJU.2015.0167


ORIGINAL ARTICLE

Alexandros Fiamegos 1, John Varkarakis 1, Michael Kontraros 1, Andreas Karagiannis 1, Michael Chrisofos 1, Dimitrios Barbalias 1, Charalampos Deliveliotis 1

1 2nd Department of Urology, University of Athens, Sismanoglio General Hospital, Athens, Greece

ABSTRACT

Introduction: Data from animal, clinical and prevention studies support the role of androgens in prostate cancer growth, proliferation and progression. Results of serum based epidemiologic studies in humans, however, have been inconclusive. The present study aims to define whether serum testosterone can be used as a predictor of a posi­tive second biopsy in males considered for re-biopsy.

Material and Methods: The study included 320 men who underwent a prostatic biopsy in our department from October 2011 until June 2012. Total testosterone, free testos­terone, bioavailable testosterone and prostate pathology were evaluated in all cases. Patients undergoing a second biopsy were identified and biopsy results were statisti­cally analyzed.

Results: Forty men (12.5%) were assessed with a second biopsy. The diagnosis of the second biopsy was High Grade Intraepithelial Neoplasia in 14 patients (35%) and Pros­tate Cancer in 12 patients (30%). The comparison of prostatic volume, total testoste­rone, sex hormone binding globulin, free testosterone, bioavailable testosterone and albumin showed that patients with cancer of the prostate had significantly greater levels of free testosterone (p=0.043) and bioavailable T (p=0.049).

Conclusion: In our study, higher free testosterone and bioavailable testosterone levels were associated with a cancer diagnosis at re-biopsy. Our results indicate a possible role for free and bioavailable testosterone in predicting the presence of prostate cancer in patients considered for re-biopsy.

Keywords:  Testosterone; Prostate; Neoplasms; Biopsy

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