Case Reports

Surgery Today

, Volume 29, Issue 7, pp 642-645

First online:

A solitary fibrous tumor in the perianal region with a 13-year follow-up: Report of a case

  • Ryo YoshidaAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Hideho TakadaAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Shigeyoshi IwamotoAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Yasunari UedonoAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Hiroshi KawanishiAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Kazuhiko YoshiokaAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Yasushi NakaneAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Koshiro HiokiAffiliated withSecond Department of Surgery, Kansai Medical University
  • , Noriko SakaidaAffiliated withDepartment of Surgical Pathology, Kansai Medical University
    • , Akiharu OkamuraAffiliated withDepartment of Surgical Pathology, Kansai Medical University

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Abstract

A case of a solitary fibrous tumor (SFT) of the perianal region in a 62-year-old man is reported herein. The patient had undergone an abdominoperineal excision of the rectum for an anorectal tumor 13 years previously, and had been referred to our hospital for a perineal mass. Computerized tomography and angiography revealed a markedly hypervascular tumor measuring 11×8 cm in size in the pelvic cavity. After preoperative radiotherapy (total 58 Gy) and the embolization of the feeding arteries, he underwent an en bloc excision of the tumor. Microscopically, the tumor was composed of spindle shaped cells with a “patternless” arrangement in a collagenous background. There was immunohistochemical evidence that these cells were strongly positive for CD34, thus suggesting the tumor to be SFT. The previously resected anorectal tumor showed similar histological and immunohistochemical findings. The patient’s recovery was uneventful.

Key Words

solitary fibrous tumor hypoglycemia CD34