title: Sclerosing epithelioid fibrosarcoma: short T2 on MR imaging.
abstract: A case of sclerosing epithelioid fibrosarcoma and its appearance on MRI is presented. The tumor showed a zonal architecture on MRI with a large central core of very low signal intensity and a peripheral rim of intermediate to high signal intensity on T1- and T2-weighted spin echo pulse sequences. The core showed decreased cellularity with dense collagen deposition on histologic examination, and the peripheral zone increased cellularity with increased nuclear atypia. The presence of a prominent region of very low signal intensity on T1- and T2- weighted images can be seen with neural tumors, giant cell tumor of the tendon sheath, aggressive fibromatosis, and, in rare instances, with soft tissue sarcomas rich in collagen.
authors.affiliation: Department of Radiology, University of Minnesota Hospital and Clincis, Minneapolis 55455, USA.
authors.forename: D R
authors.initials: DR
authors.lastname: Christensen
authors.forename: R
authors.initials: R
authors.lastname: Ramsamooj
authors.forename: T J
authors.initials: TJ
authors.lastname: Gilbert
mesh_terms: D000328:Adult; D015622:Epithelioid Cells / Q000473:pathology*; D005354:Fibrosarcoma / Q000473:pathology*; D006801:Humans; D007866:Leg; D008279:Magnetic Resonance Imaging; D008297:Male; D018482:Muscle, Skeletal / Q000473:pathology; D012598:Sclerosis; D012983:Soft Tissue Neoplasms / Q000473:pathology*