[A case of right adrenal myelolipoma diagnosed preoperatively and review of literature in Japan]

Abstract

Fifty-nine years old female who complained of right back pain was diagnosed as having right adrenal myelolipoma preoperatively by ultrasound, CT and other examinations. The patient was cured by surgery. The resected tumor was 11.5 X 10.5 X 8.5 cm in size and 470 g in weight. Histopathological diagnosis was myelolipoma of Soós's type 1. Sixteen cases of myelolipoma, including our case have been reported in Japanese literature. The age of patients ranged from 20 to 60 (average 49.1) and male-female ratio was 11:5. Most patients presented with abdominal pain and abdominal mass, and had complication of obesity and hypertension. The lesion was more common on the right side (11:5). Their size was 3-21 cm (average 10.9 cm) and their weight was 10-1, 930 g (average 823 g). Adrenal myelolipoma can be certainly diagnosed preoperatively by ultrasound, CT and other examinations. Adrenal tumors showing normal adrenal endocrine function and fat density on CT examination indicate that they could be myelolipoma in their nature.