Orbital granulocytic sarcoma in an elderly patient.

Abstract

To report a 71-year-old woman with acute myelogenous leukemia in remission who developed orbital granulocytic sarcoma. The patient was referred for acute proptosis and decreased vision of the right eye. Computed tomography of the orbits demonstrated a right extraconal mass compressing the optic nerve. A right lateral orbitotomy was performed, and a portion of the mass was excised for diagnostic purposes and orbital decompression. Histopathologic and immunohistochemical evaluation disclosed orbital granulocytic sarcoma. With chemotherapy and radiation, vision remained stable and right proptosis resolved. Orbital granulocytic sarcoma is usually diagnosed in children with a history of acute myelogenous leukemia. This case demonstrated that this entity may also occur rarely in older patients with a history of acute myelogenous leukemia.