Myeloid sarcoma in brain and optic nerve presented as a relapse of acute myeloid leukemia: A case report.

Myeloid sarcoma (MS) is a rare extramedullary infiltration of acute myeloid leukemia (AML). We present a case of 19-year-old male with AML-M2 who relapse with AML sarcoma in brain and optic nerve. MS as AML extramedullary relapse had a poor prognosis.