J.Jpn. Surg. Soc.. 86(5): 640-644, 1985

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Original article

ADRENAL MYELOLIPOMA : A CASE REPORT

A 51-year old obese man had been followed up for diabetes mellitus and hypertension. Hepatomegaly was noted on routine examination without any complaints in 1981. Through further investigation of the liver, a large hyperechoic mass lesion was shown between right kidney and the liver on ultrasonogram.
On admission, diabetes was controlled by diet alone and blood pressure was 160/90 mmHg. without medication. There were no abnormal findings in laboratory data including hormone assays. The mass showed fat density on CT scan and hypovascularity on angiogram. The mass was diagnosed as benign non-functioning right adrenal tumor, most likely myelolipoma.
By operation, the tumor was removed through long subcostal incision. The tumor was well defined and encapsulated,14×8×8cm. in size and 480g. in weight.
Microscopically the tumor was typical myelolipoma with a mixture of hematopoietic and adipose tissue. Postoperative course was uneventful and the patient discharged on 17-th postoperative day.
Myelolipoma of the adrenal gland is a rare non-functioning benign tumor consisting of fat cell and bone marrow element. Only 30 resected cases of adrenal myelolipoma have been reported in the world including 7 cases in our country.

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