TESTICULAR ADRENAL REST TISSUE IN CONGENITAL ADRENAL-HYPERPLASIA - FINDINGS AT GRAY-SCALE AND COLOR DOPPLER US

PURPOSE: To study the ultrasound (US) features of scrotal adrenal rest tissue in congenital adrenal hyperplasia (CAH). MATERIALS AND METHODS : Gray-scale and color Doppler US examinations were performed of scrot al masses in eight patients. The masses were evaluated for size, locat ion, echogenicity, sound attenuation, and vascularity. RESULTS: Sevent een intratesticular masses and one extratesticular mass were examined. All were hypoechoic except for one intratesticular mass that containe d hyperechoic areas. Six masses demonstrated sound attenuation. The me diastinum testis was found in the center of 11 of the 17 intratesticul ar masses. At color Doppler US, six masses were hypervascular, seven w ere isovascular, and five were hypovascular relative to the normal tes ticle. All intratesticular masses contained vascular structures that e ntered them from the normal testis without change in course or caliber . Eleven masses showed a spokelike pattern of converging vessels. CONC LUSION: The US features of scrotal adrenal rests assist diagnosis of C AH.