title: CT findings of retroperitoneal malignant mesenchymoma.
abstract: Malignant mesenchymoma (MM) is a rare mesenchymal neoplasm which, by definition, demonstrates at least two distinct types of malignant mesenchymal differentiation. We present the computed tomographic (CT) findings of a 42-year-old female with a pathologically proven retroperitoneal MM consisting of osteoid production combined with foci of liposarcoma and Kaposi sarcoma. MM should be considered along with extraosseous osteosarcoma and teratoma in the differential diagnosis for unusual large heterogeneous retroperitoneal masses with massive calcification.
authors.affiliation: Department of Radiology, University of Florida College of Medicine, Shands Teaching Hospital, Gainesville 32610-0374.
authors.forename: S K
authors.initials: SK
authors.lastname: Mukherji
authors.forename: A M
authors.initials: AM
authors.lastname: Rojiani
authors.forename: C M
authors.initials: CM
authors.lastname: Younathan
authors.forename: P
authors.initials: P
authors.lastname: Ros
mesh_terms: D000328:Adult; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008637:Mesenchymoma / Q000175:diagnosis / Q000000981:diagnostic imaging*; D012516:Osteosarcoma / Q000175:diagnosis; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis / Q000000981:diagnostic imaging*; D013724:Teratoma / Q000175:diagnosis; D014057:Tomography, X-Ray Computed