Perirrenal Retroperitoneal Myelolipoma: A Case Report

Myelolipoma is a relatively rare benign tumor which is most commonly located in the adrenal glands. Histologically is characterized by eritroid and myeloid precursor cells intermixed with mature adipose tissue. The diagnosis is generally incidental in abdominal imaging studies. Clinically most are asymptomatic, nevertheless larger tumors are at greater risk for complications such as hemorrhage or compression of surrounding structures. Incidental findings smaller than 4 cm should be followed-up by imaging. Tumors measuring more than 7 cm or those that are symptomatic a surgical approach is mandated. We present the case of a 78-year-old man with an extra-adrenal myelolipoma.