Simultaneous idiopathic adrenal hemorrhage and renal vein thrombosis in the newborn.

We report the simultaneous occurrence of renal venous thrombosis and idiopathic adrenal hemorrhage in 2 newborns. Definitive diagnosis can be determined with various laboratory and radiographic diagnostic studies, particularly radioisotope renal scanning and ultrasonography. Familiarity with the appropriate studies for evaluation of the newborn with an abdominal mass may avoid unnecessary surgical exploration.