American Journal of Roentgenology, Vol 172, 1235-1238, Copyright © 1999 by American Roentgen Ray Society

ARTICLES

Testicular adrenal rest tissue in congenital adrenal hyperplasia: serial sonographic and clinical findings

NA Avila, TS Shawker, JV Jones, GB Cutler Jr and DP Merke
Diagnostic Radiology Department, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, MD 20892-1182, USA.

OBJECTIVE: The purpose of this study was to describe the serial sonographic findings and clinical and laboratory data obtained during follow-up of patients with congenital adrenal hyperplasia in whom testicular adrenal rest tissue develops. MATERIALS AND METHODS: We retrospectively reviewed testicular sonography and laboratory data for 12 patients with congenital adrenal hyperplasia who also had intratesticular masses consistent with adrenal rest tissue. The studies were done during follow-up that ranged from 7 months to 10 years. RESULTS: During follow-up of 11 of the 12 patients after the initial sonographic diagnosis, the testicular adrenal rest tissue either remained stable in size (n = 1), grew larger or smaller (n = 9), disappeared (n = 4), or reappeared after disappearing (n = 3). In one patient, the testicular adrenal rest tissue grew very rapidly in a 1- month interval. Discordant changes in the testicular adrenal rest tissue were noted in 10 patients with bilateral masses. We found no relationship between the change in size of the masses and clinical control (based on 17-hydroxyprogesterone level) at the time of sonography. CONCLUSION: In patients with congenital adrenal hyperplasia who have testicular masses detected sonographically, testicular adrenal rest tissue is the most likely diagnosis. Testicular adrenal rest tissue may remain stable in size, grow larger or smaller, or disappear during sonographic follow-up. The change in size may be marked, may occur very rapidly, and, in our study cohort, was not related to short- term clinical control based on 17-hydroxyprogesterone level at the time of sonography.
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