Extramedullary Hematopoiesis

  • 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

Cases of Extramedullary Hematopoiesis