Extramedullary Acute Myeloid Leukemia Tumor Presenting in the Radial Nerve.

Teaching Point: Extramedullary acute myeloid leukemia tumor belongs to the differential diagnosis when a tumor develops in a patient with a history of leukemia, and magnetic resonance imaging is of diagnostic value by demonstrating iso-intensity and hyperintensity compared to skeletal muscle respectively on T1- and T2-weighted images and homogeneous contrast enhancement.