title: Perivascular epitheloid cell tumor (PEComa) mimicking retroperitoneal liposarcoma.
abstract: PEComas are a collection of generally rare tumors, defined by the World Health Organization as 'mesenchymal tumors composed of histologically and immunohistochemically distinctive perivascular epitheloid cells'. We describe the case of retroperitoneal PEComa with a liposarcoma-like appearance on cross-sectional imaging, but distinctive immunohistochemistry revealing the correct diagnosis.
authors.affiliation: Department of Diagnostic and Interventional Radiology, Klinikum Rechts der Isar, TU München, Ismaningerstrasse 22, München D-81675, Germany. moritz.wildgruber@tum.de.
authors.forename: Moritz
authors.initials: M
authors.lastname: Wildgruber
authors.forename: Karen
authors.initials: K
authors.lastname: Becker
authors.forename: Marcus
authors.initials: M
authors.lastname: Feith
authors.forename: Jochen
authors.initials: J
authors.lastname: Gaa
mesh_terms: D000368:Aged; D014408:Biomarkers, Tumor / Q000378:metabolism*; D006801:Humans; D007124:Immunoenzyme Techniques; D008080:Liposarcoma / Q000175:diagnosis* / Q000378:metabolism; D008279:Magnetic Resonance Imaging; D008297:Male; D054973:Perivascular Epithelioid Cell Neoplasms / Q000175:diagnosis* / Q000378:metabolism; D011379:Prognosis; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis* / Q000378:metabolism; D014057:Tomography, X-Ray Computed
chemical_list: D014408:Biomarkers, Tumor