title: Extramedullary hematopoiesis in chronic myelofibrosis encasing the pelvicaliceal system and perirenal spaces: CT findings.
abstract: We examined a 46-year-old male patient with idiopathic myelofibrosis diagnosed 28 months earlier. After chemotherapy and irradiation, CT showed nonnodular, soft tissue masses in the renal hilum, pelvicaliceal system, perirenal and periureteral spaces. Ultrasound-guided biopsy showed extramedullary hematopoiesis (EMH). The mass, which caused delayed nephrographic enhancement, without hydroureteronephrosis, was the only site of EMH. We report the CT findings of this uncommon EMH localization.
authors.affiliation: Department of Radiology, University of Pavia, IRCCS Policlinico S. Matteo, Pavia, Italy. istirad@smatteo.pv.it
authors.forename: Alfredo
authors.initials: A
authors.lastname: La Fianza
authors.forename: Lorella
authors.initials: L
authors.lastname: Torretta
authors.forename: Angelo
authors.initials: A
authors.lastname: Spinazzola
mesh_terms: D002908:Chronic Disease; D018450:Disease Progression; D005500:Follow-Up Studies; D006411:Hematopoiesis, Extramedullary; D006801:Humans; D007670:Kidney Calices / Q000000981:diagnostic imaging*; D008297:Male; D008875:Middle Aged; D055728:Primary Myelofibrosis / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed