title: Extramedullary hematopoiesis presenting as a focal splenic mass: a case report.
abstract: We report the ultrasound, computed tomographic, and magnetic resonance imaging findings in a case of extramedullary hematopoiesis presenting as a focal splenic mass in a patient with myelodysplastic syndrome. Ultrasound demonstrated a well-circumscribed hyperechoic mass, whereas computed tomography showed a heterogeneous mass better visualized after administration of intravenous contrast. On magnetic resonance imaging, the lesion was hypointense to the spleen on T1-weighted images, with increased signal on T2-weighted images, and demonstrated enhancement after intravenous contrast administration. Extramedullary hematopoiesis should be considered in the differential diagnosis for a splenic mass in any patient with a hematologic disorder.
authors.affiliation: Department of Radiology, UMD-New Jersey Medical School University Hospital, C320 Newark, NJ 07103, USA. simmonmz@umdnj.edu
authors.forename: A
authors.initials: A
authors.lastname: Singer
authors.forename: P
authors.initials: P
authors.lastname: Maldjian
authors.forename: M Z
authors.initials: MZ
authors.lastname: Simmons
mesh_terms: D000368:Aged; D001707:Biopsy, Needle; D006411:Hematopoiesis, Extramedullary; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D009190:Myelodysplastic Syndromes / Q000473:pathology*; D013154:Spleen / Q000000981:diagnostic imaging / Q000473:pathology*; D036542:Tomography, Spiral Computed; D014463:Ultrasonography