The occurrence of bilateral giant adrenal incidentalomas is reported in a 22-year-old man who was evaluated for urinary tract infection. The right gland measured 16 cm, the left one 6 cm at computed tomography. Height was 145 cm, blood pressure 190/100 mm Hg. Testes were not palpable. Laboratory investigations revealed elevated levels of 17 hydroxyprogesterone:>50 ng/ml (n<1,1); 11 desoxycortisol: 919 nmol/l (n<30); testosterone: 19 ng/ml (n<0.7) and ACTH: 1 402 ng/l (n<48). Karyotype was 46 XX. The patient was a female pseudohermaphrodite with congenital adrenal 11 B hydroxylase deficiency. Adrenal masses responded to glucocorticoid therapy with marked reduction of their size after six months. We confirm previous recommendations that patients with adrenal incidentaloma should be checked for congenital adrenal hyperplasia.