Two Cases of Rectal Cancer Prolapsing through the Anus

Hiroyuki Yuzawa, Norihiro Kohara, Yoshifumi Kajiwara, Kazuyuki Ozeki, Kouichi Motojima, Takashi Kanematsu

Second Department of Surgery, Nagasaki University School of Medicine

Two cases of rectal cancer with stele prolapsing through the anus are reported. Case 1 was a 5l-year-old man who was admitted with a complaint of tumor prolapsing through the anus. Barium enema showed a tumor 5 cm from the anal verge, about 4 cm in diameter. Low anterior resection with lymph node dissection was performed. Pathological examination revealed that the prolapsing tumor was adenocarcinoma in adenoma. Case 2 was a 68-year-old woman who was admitted with complaints of anal bleeding and a tumor prolapsing through the anus. Barium enema showed a tumor 3 from the anal verge, about 6 cm in diameter. endoscopic ultrasonography showed no evidence of propria muscularis invasion. The tumor was resected at the stele. Pathological examination revealed that the tumor was localized inside the submucosa and the distal edge of the stele was not invaded. There are two ways in which rectal cancer prolapses through the anus: only tumor with stele prolapses or tumor prolapses with rectal prolapse. In the former, there is a good possibility that the tumor is early cancer, regardless of its size. Both cases reported here were the former.

Key words
rectal cancer, prolapse of tumor

Reprint requests
Hiroyuki Yuzawa Second Department of Surgery, Nagasaki University School of Medicine
1-7-1 Sakamoto, Nagasaki, 852 JAPAN

Accepted
June 12, 1996

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