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Abraham Morgentaler, MD; Carl O. Bruning III, MD; William C. DeWolf, MD

JAMA. 1996;276(23):1904-1906.

Abstract
Objective.
—To determine the prevalence of occult prostate cancer in men with low serum total testosterone or free testosterone levels.

Design.
—Retrospective analysis of a consecutive series of men.

Setting.
—Academic teaching hospital.

Patients.
—Seventy-seven men with low total testosterone or free testosterone levels, with normal results of digital rectal examination and prostate-specific antigen (PSA) levels of 4.0 ng/mL or less. The mean age was 58 years.

Interventions.
—Sextant prostate needle biopsies with ultrasound guidance.

Main Outcome Measures.
—Results of prostate needle biopsies, transrectal ultrasound, prostate volume, PSA level, PSA density, total and free testosterone levels.

Results.
—Prostate cancer was identified in 14% (11/77) of the entire group and in 10 men (29%) aged 60 years or older. The median age for men with cancer was 64 years. Histologic examination showed Gleason scores of 6 or 7 for all cancers. No significant differences were noted between the cancer and benign groups with regard to PSA level, PSA density, prostate volume, total testosterone level, or free testosterone level.

Conclusions.
—A high prevalence of biopsy-detectable prostate cancer was identified in men with low total or free testosterone levels despite normal PSA levels and results of digital rectal examination. These data suggest that (1) digital rectal examination and PSA levels are insensitive indicators of prostate cancer in men with low total or free testosterone levels, and (2) PSA levels may be altered by naturally occurring reductions in serum androgen levels.

Author Affiliations
From the Division of Urology, Beth Israel Hospital, Harvard Medical School, Boston, Mass.

Footnotes
Reprint requests to Division of Urology, Beth Israel Hospital, 330 Brookline Ave, Boston, MA 02215 (Dr Morgentaler).

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