A Case of Pelvic Giant Hemangiopericytoma Resected with Rectum and Bladder

Yuzo Fujii¹⁾²⁾, Hironobu Yanagie¹⁾³⁾, Hiroyuki Hasebe¹⁾, Iwao Yoshizaki¹⁾ and Masazumi Eriguchi¹⁾³⁾

¹⁾Department of Surgery, Institute of Medical Science, University of Tokyo
²⁾Hijirigaoka Hospital
³⁾Research Center for Advanced Science and Technology, University of Tokyo

An 18-year-old man admitted for a lower abdominal tumor and pollakiuria was found in ultrasonography, barium enema, computed tomography, and magnetic resonance imaging to have a large pelvic mass displacing the rectum to the right dorsum and the bladder to the right superior side and obstructing the left ureter. The tumor was huge, painless, elastically hard and poorly mobile. Angiography indicated a hypervascular tumor fed by the left obturator and superior rectal arteries. After these arteries were embolized, the tumor, rectum, left seminal vesicle, bladder, and left ureter were resected. To reconstruction the urinary tract, the sigmoid colon between the left ureter and bladder was used. Histopathologically, the tumor was borderline malignant hemangiopericytoma, evidenced by spindle cells surrounding capillary blood vessels and few mitotic cells. In the 6 years since surgery, no evidence of recurrence has been found. Since histopathological malignant features remain obscure, long-term, follow-up is important.

Key words
hemangiopericytoma, pelvic tumor, urinary reconstruction

Reprint requests
Yuzo Fujii Hijirigaoka Hospital 2-69-6 Renkouji, Tama, 206-0021 JAPAN

Accepted
October 30, 2002

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