title: [Solitary fibrous tumor of the urinary bladder: a case report].
abstract: Solitary fibrous tumor (SFT) is one of the mesenchymal tumor usually occurs in the pleura. Extrapleural occurrence of SFT is uncommon. We herein report an extremely rare case of 72-year old man with SFT originated in the urinary bladder. The tumor was incidentally discovered as a mass of 8.5 mm in diameter by a pelvic MRI. Cystoscopy revealed the protruding submucosal tumor in the center of the trigon. Transurethral resection was carried out. Pathological examination revealed a tumor composed of spindle cells with rich vascularity surrounded by abundant collagen fibers. The immunohistochemical findings showed a strong positivity to CD 34 and relatively weak positivity to Bcl-2. MIB-1 index indicated less than 3%, thus the tumor was diagnosed as a solitary fibrous tumor. The patient has no evidence of disease 16 months after the surgery. The current case was the first report in Japan and the twelfth worldwide.
authors.affiliation: Department of Urology, National Hospital Organization Osaka National Hospital.
authors.forename: Cong
authors.initials: C
authors.lastname: Wang
authors.forename: Naoki
authors.initials: N
authors.lastname: Miyago
authors.forename: Yasunori
authors.initials: Y
authors.lastname: Harada
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Yasunaga
authors.forename: Toshitsugu
authors.initials: T
authors.lastname: Oka
mesh_terms: D000368:Aged; D006801:Humans; D008297:Male; D054364:Solitary Fibrous Tumors / Q000175:diagnosis* / Q000473:pathology; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000473:pathology