- Etiology: response to long-standing anemia or extensive bone marrow replacement from myeloproliferative disorder
- Imaging: mass-like expansion of hematopoietic tissue outside of bone marrow, common location is paravertebral in the posterior mediastinum, also see diffuse hepatomegaly + splenomegaly
- Clinical: usually asymptomatic and incidentally detected
Radiology Cases of Extramedullary Hematopoiesis
