A Case Report of Malignant Schwannoma of the Rectum

Hiroshi Yoshida¹⁾, Kaku Egami¹⁾, Masayo Wada¹⁾, Shotaroh Maeda²⁾, Noritake Tanaka³⁾, Masahiko Onda³⁾

¹⁾Department of Surgery, Nippon Medical School Hospital of Tama-nagayama
²⁾Department of Pathology, Nippon Medical School Hospital of Tama-nagayama
³⁾First Department of Surgery, Nippon Medical School

We report a patient with a huge malignant schwannoma of the rectum, who had persistently refused surgery for 40 months. A 58-year-old woman presented to Nippon Medical School Hospital of Tama-nagayama for first the time in June, 1990, with a complaint of anal pain. Investigations revealed a submucosal tumor of the rectum, 4 cm in diameter. Subsequently, the patient presented to the hospital several times complaining of anal pain, because of the rapid disappearnace of the pain, however, the patient refused surgerv. In October, 1993, the patient was again admitted to the Tama-nagayama Hospital complaining of recurrent severe anal pain, mass, fever, weight loss and inability to walk and sit. Pus was discharged from a huge hip tumor, 15×15×10 cm in size. Laboratory investigation revealed high IAP values of 736 µs/ml (normal 500 ≥). Abdominoperineal excision of the rectum was performed. Microscopic examination revealed the tumor to be a malignant schwannoma. The postoperative course was uneventful and the patient discharged from the hospital. Investigations revealed growth of the tumor. The tumor was thus calculated to be 14 months from 4 cm to 5 cm in size, and 26 months from 5 cm to 10 cm in size.

Key words
malignant schwannoma, rectum

Reprint requests
Hiroshi Yoshida First Department of Surgery, Nippon Medical School
1-1-5 Sendagi, Bunkyo-ku, Tokyo, 113 JAPAN

Accepted
February 12, 1997

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