Testicular adrenal rest tumours in an adult patient with congenital adrenal hyperplasia.

Testicular adrenal rest tumours (TART) are found in patients with congenital adrenal hyperplasia (CAH) with the severity of testicular infiltration linearly related to the degree of enzymatic defect and subsequent compliance with treatment. We report a highly unusual case of TART in an adult patient with CAH caused by 21-hydroxylase deficiency who had not engaged with health services over a 3-year period. Typical imaging features of TART include bilateral well-defined lesions adjacent to the rete testes.