SAT-208 An Adrenal Incidentaloma with Extramedullary Hematopoiesis

Introduction: Adrenal adenomas are incidentally noted during nonadrenal disease imaging at a rate up to 4%. Frequency of incidentalomas increases with age, most being adrenocortical adenomas. This case highlights an uncommon etiology of such an adrenal mass finding. Case Description: A 37-year-old with a history of hypertension, hypothyroidism, and tobacco use was admitted after post-operative complication. Prior to surgery, she had been experiencing right upper quadrant pain along with 70 lb weight loss and diarrhea. She otherwise had frequent palpitations. Patient had undergone cholecystectomy and common hepatic duct injury was noted. Imaging revealed a 5.3 x 3.5 cm right adrenal mass previously unknown prior to surgery. Hormonal workup was negative for overproduction of aldosterone, cortisol, DHEA-S or metanephrines. Discussion: Patient underwent successful resection of adrenal mass, revealing adrenal adenoma with osseous metaplasia and hematopoiesis. Extramedullary hematopoiesis is a usually discovered incidentally as in this case. Typical sites are the spleen and liver. Cases of adrenal gland manifestations have been reported in the presence of hemoglobinopathies (thalassemia, hereditary spherocytosis) or myelofibrosis. At four-month follow-up, laboratory testing on this patient didn’t suggest any erythrocytic or leukocytic disorder. Conclusion: This case highlights an uncommon finding of hematopoiesis in an adrenal incidentaloma without any underlying hematologic defect or disease. References: Motta, I., Boiocchi, L., Delbini, P., Migone De Amicis, M., Cassinerio, E., Dondossola, D., Rossi, G. and Cappellini, M. D. (2016), A giant adrenal myelolipoma in a beta‐thalassemia major patient: Does ineffective erythropoiesis play a role?. Am. J. Hematol., 91: 1281-1282. doi:10.1002/ajh.24446. Stewart P, Newell-Price J. (2016). The Adrenal Cortex. In Melmed S, Polonsky K, Larsen P, Kronenberg H, Williams Textbook of Endocrinology. (13th ed., pp 489-555). Philadelphia, PA: Elsevier