Myeloid sarcoma as a manifestation of acute myeloid leukemia.

We report a case of a 43-year-old man who presented with dyspnea because of large bilateral pleural effusions and imaging findings of a large periaortic mass with compression of the esophagus and left atrium. Subsequent soft tissue biopsy was consistent with myeloid sarcoma, and bone marrow biopsy was consistent with acute myeloid leukemia. He was started on induction and subsequent consolidation chemotherapy with complete remission and shrinkage of the tumor.