Abstract
Thirteen adult patients with biochemically proven congenital adrenal hyperplasia (CAH) were examined by computed tomography (CT). Six patients had never received glucocorticoid therapy. In three of those six patients, CT revealed a tumorous transformation in one of the hyperplastic adrenal glands. In the seven patients with CAH who were treated since childhood, no mass could be demonstrated on CT. The development of an adrenocortical tumour due to chronic adrenal cortical stimulation by excessive adreno-cortico-trophic hormone (ACTH) production in adult patients with untreated CAH may not be a rare occurrence, as is demonstrated in this series. It is important not to confuse this entity with a primary virilizing adrenal tumour which requires a different form of treatment. In case of tumorous transformation in untreated adults with CAH, suppressive therapy with CT control should be favoured over surgery, as long as the tumour is ACTH-dependent. Moreover, these observations illustrate the desirability of lifelong glucocorticoid therapy in patients with CAH, including adult males who biochemically may not require suppression of steroid androgen excess.
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