title: MRI of angiomatoid fibrous histiocytoma.
abstract: Angiomatoid fibrous histiocytoma is a rare soft tissue tumor of low-grade malignancy. We present the case of a 32-year-old man who complained of soreness and numbness over his left arm and hand over the previous 2 months and of having a palpable mass over his left upper back for 4 years. Magnetic resonance imaging (MRI) showed an intramuscular soft tissue mass in the left scapular region. The tumor mass was seen to have multiple cystic components with fluid-fluid levels. Histological examination showed multiple cystic spaces filled with blood lakes and hemosiderin deposits in the solid part of the tumor. After the initial surgery, the patient had local recurrences over 2.5 years. The immunohistochemical study at the second surgery showed that the recurrent tumor was strongly positive for the histiocytic marker CD68, and the myoid trait desmin. Histological diagnosis was compatible with angiomatoid fibrous histiocytoma.
authors.affiliation: Department of Radiology, Taipei Municipal Jen-Ai Hospital, Taipei, Taiwan, Republic of China.
authors.forename: Chao-Shiang
authors.initials: CS
authors.lastname: Li
authors.forename: Wing P
authors.initials: WP
authors.lastname: Chan
authors.forename: Wei-Tsung
authors.initials: WT
authors.lastname: Chen
authors.forename: Chih-Peng
authors.initials: CP
authors.lastname: Chang
authors.forename: Li-Sun
authors.initials: LS
authors.lastname: Shih
authors.forename: Ran-Chou
authors.initials: RC
authors.lastname: Chen
authors.forename: Hsing-Yang
authors.initials: HY
authors.lastname: Tu
mesh_terms: D000328:Adult; D015703:Antigens, CD / Q000032:analysis; D015214:Antigens, Differentiation, Myelomonocytic / Q000032:analysis; D003893:Desmin / Q000032:analysis; D005500:Follow-Up Studies; D018219:Histiocytoma, Benign Fibrous / Q000175:diagnosis*; D006801:Humans; D007150:Immunohistochemistry; D008264:Macrophages / Q000473:pathology; D008279:Magnetic Resonance Imaging; D008297:Male; D019042:Muscle Neoplasms / Q000175:diagnosis*; D009364:Neoplasm Recurrence, Local / Q000473:pathology; D012540:Scapula; D000097382:CD68 Molecule
chemical_list: D015703:Antigens, CD; D015214:Antigens, Differentiation, Myelomonocytic; D003893:Desmin; C067980:CD68 antigen, human; D000097382:CD68 Molecule