Mielolipoma suprarrenal derecho gigante

objective: adrenal myelolipoma is a rare benign tumor, well limited, variable in size, composed of fatty and hematopoietic tissues, the finding of which is usually incidental. if they reach a big size they may produce the feeling of abdominal mass, pain, neighbour organs compression and acute intratumoral or retroperitoneal hemorrhage. methods: we report the case of a 57-year-old male admitted to the hospital with acute abdominal pain. ct scan with iv contrast and adrenal biopsy were performed. results: radiological findings: 9 x 10 cm right adrenal mass, well defined, hypodense, with a small calcification in its posterior area. pathologic findings: benign tumor, encapsulated, with a mixture of mature fatty tissue and hematopoietic cells. conclusions: the presence of fat within an adrenal mass is essential for the diagnosis. differential diagnosis should be done with all adrenal tumors with a fat component. when no radiological diagnosis is made, pathologic confirmation is necessary.