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Journal of Clinical Endocrinology & Metabolism, Vol 63, 1091-1099, Copyright © 1986 by Endocrine Society

ARTICLES

Characterization of the testicular abnormality in 5 alpha-reductase deficiency

L Johnson, FW George, WB Neaves, IM Rosenthal, RA Christensen, A Decristoforo, HU Schweikert, MV Sauer, M Leshin and JE Griffin

The testes of five phenotypic women (from four families) with 5 alpha- reductase deficiency were studied. In one of the patients, the enzyme deficiency was similar in the testis and epididymis and in fibroblasts cultured from the labia majora. In testes from four of the patients, the concentrations of the 5 alpha-reduced steroids dihydrotestosterone and 3 alpha-androstanediol were less than 10% of those in normal subjects. We conclude that the testis is involved in 5 alpha-reductase deficiency. Impaired spermatogenesis was evident in testicular biopsies from all five subjects, and in two, sperm production, as estimated in testicular homogenates, was less than 10% of normal. The extent to which spermatogenic arrest is due to 5 alpha-reductase deficiency or testicular maldescent is not clear.


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