Case 54: Extramedullary Hematopoiesis

Diagnostic Category:

Clinical Presentation:

71 year old man with incidental finding in the liver.

CT: Fat density, round.

Imaging Findings:

71 year old man with a pancreatic mass and an incidental finding of an unrelated fatty mass in the right hepatic lobe. Note very subtle non-enhancing capsule. Attenuation coefficient of the unenhanced mass is -20HU, typical for fat. No enhancement of the mass. Biopsy confirmed benign fatty bone marrow. Note that well differentiated liposarcoma metastases may look identical on CT.