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Journal of Clinical Endocrinology & Metabolism, Vol 43, 506-511, Copyright © 1976 by Endocrine Society

ARTICLES

Endocrine studies in a phenotypic girl with XY gonadal agenesis

RH Wu, RM Boyar, R Knight, L Hellman and JW Finkelstein

An 18-year-old phenotypic girl with XY gonadal agenesis had endocrine studies. The patient had a small amount of sexual hair, a slightly enlarged clitoris, normal labia and no posterior fusion. Her vagina was of normal length, but no cervix was palpable. At laparoscopy, no gonads, uterus or fallopian tubes were identified. The buccal smear was chromatin negative and the karyotype was 46XY. The 24 h LH plasma pattern was qualitatively similar to that found in normal late pubertal subjects, but the values were in the castrate range. The 24h mean plasma concentrations of testosterone and dihydrotestosterone were 16.4 ng/dl and 14.2 ng/dl, respectively. Urinary estrogen excretion was 15 and 19 mug/day. These clinical and endocrine findings suggest that the patient was a genetic male in whom Mullerian regression occurred normally; however, the testes probably ceased functioning early in gestation preventing normal development of the Wolffian system. This set of events resulted in agenesis of the gonaductal system and female external genitalia. The patient represents the second example of this variation of male pseudohermaphroditism associated with XY gonadal agenesis.




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Copyright © 1976 by The Endocrine Society