A Case of Sigmoid Colon Cancer Associated with Periproctal Abscess

Shinya Hamasu¹⁾, Naoki Yokoo¹⁾, Michio Kimoto²⁾, Takashi Shiroko¹⁾, Takahito Adachi²⁾, Takahiro Yoshida²⁾, Yoshihiro Tanaka²⁾, Hiromitsu Nagata²⁾, Kouji Kitamura²⁾ and Kiyohisa Okamoto³⁾

Department of Emargency¹⁾, Surgery²⁾and Pathology³⁾, Takayama Red Cross Hospital

We report a case of sigmoid colon cancer associated with periproctal abscess. Despite a few reports of periproctal abscess presenting with rectal cancer, no cases of this disease caused by sigmoid colon cancer have, to our knowledge, been reported. A 51-year-old man with perianal pain was found in enhanced pelvic CT to have an ischiorectal abscess, so we conducted abscess drainage and lavage. Because of increased tumor markers, we conducted colonoscopy after local inflammation improved, and found sigmoid colon cancer. A laparotomy under general anesthesia showed that the cancer ulcer penetrated the pelvic wall and levator ani, causing an ischiorectal abscess. We resected the sigmoid colon. Histopathological findings showed well-differenciated adenocarcinoma invading the muscularis propria but did not the pelvic wall. It is thus necessary to consider the possibility of malignancy in periproctal abscesses.

Key words
ischiorectal abscess, sigmoid colon cancer

Reprint requests
Shinya Hamasu Department of Emargency, Takayama Red Cross Hospital
3-11 Tenman-cho, Takayama, 506-8550 JAPAN

Accepted
April 28, 2004

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