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Myelolipoma

Etiology: • Unknown

Pathogenesis: • Probably hamartomas rather than true neoplasms.

Epidemiology: • Rare.

General Gross Description: • Tumors are round, firm, yellowish to red lesions. • Usually well demarcated and separated by surrounding tissue by a capsule. • Usually seen in the adrenal gland.

General Microscopic Description: • Histologically, composed of normal, adult, mature adipocytes admixed with bone marrow elements.

Clinical Correlations: • Rare tumors, usually small and asymptomatic. • Usually detected at autopsy. • Occasionally, they become large. • Large, intra-abdominal lesions could cause nausea and/or constipation.

References: •Enzinger, F.M. and Weiss, S.W. Soft tissue tumors. II Edition. C.V.Mosby. 1988. pp 323.