title: CT features of presacral mass: an unusual focus of extramedullary hematopoiesis.
abstract: A case of beta-thalassemia with an unusual focus of extramedullary hematopoiesis is reported. The presacral area was involved producing a significant mass effect on the rectum.
mesh_terms: D006410:Hematopoiesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D012445:Sacrococcygeal Region / Q000000981:diagnostic imaging; D013789:Thalassemia / Q000000981:diagnostic imaging / Q000503:physiopathology*; D014057:Tomography, X-Ray Computed