• We describe a premature female infant exposed in utero to danazol during the first trimester of pregnancy. She was first observed in the newborn period with marked degree virilization and clinical findings suggestive of salt-losing congenital adrenal hyperplasia. This was supported by the high plasma levels of 17α-hydroxyprogesterone and adrenocorticotropic hormone and low plasma cortisol level. Levels of testosterone, androstenedione, 11-deoxycortisol, and renin were also elevated. An excessive increase in the levels of 17α-hydroxyprogesterone and 11-deoxycortisol to corticotropin administration associated with impaired increase in plasma cortisol level strongly suggests a partial block in the 21-hydroxylation of 17α-hydroxyprogesterone. However, the high levels of 11-deoxycortisol also suggest a block of the steroid 11 β-monooxygenase. A year later she was found to have normal basal levels of the adrenal steroids and normal response to corticotropin administration, pointing out the transitory nature of these abnormalities. It may be hypothesized that danazol produced a transitory block of the steroid 21- and 11β-monooxygenases in this child.
(Am J Dis Child 1981;135:1032-1034)