Granulocytic sarcoma presenting as bilateral adrenal masses

Granulocytic sarcoma (GS) is a collection of immature myeloid cells contained outside the bone marrow often seen in association with acute myeloid leukemia or as a sign of leukemic transformation in myeloproliferative disorders. Rarely, GS is an isolated finding unaccompanied by another hematological disorder. GS can occur at a variety of sites, most commonly involving the bone, soft tissue, lymph nodes, or skin. We report GS presenting as bilateral adrenal masses in a patient without an antecedent hematologic illness.