Case Report
Copyright ©2006 Baishideng Publishing Group Co., Limited. All rights reserved.
World J Gastroenterol. Oct 7, 2006; 12(37): 6077-6079
Published online Oct 7, 2006. doi: 10.3748/wjg.v12.i37.6077
Sigmoid colonic carcinoma associated with deposited ova of Schistosoma japonicum: A case report
Wen-Chang Li, Zhi-Gang Pan, Yi-Hong Sun
Wen-Chang Li, Zhi-Gang Pan, Department of General Practice, Zhongshan Hospital, Fudan University, Shanghai, China
Yi-Hong Sun, Department of General Surgery, Zhongshan Hospital, Fudan University, Shanghai, China
Correspondence to: Dr. Wen-Chang Li, Department of General Practice, Zhongshan Hospital, Fudan University, Shanghai 200032, China. wenchangli@gmail.com
Telephone: +86-21-64041990 Fax: +86-21-64037181
Received: June 21, 2006
Revised: July 3, 2006
Accepted: July 7, 2006
Published online: October 7, 2006
Abstract

We report a case of sigmoid colonic carcinoma associated with deposited ova of Schistosoma japonicum. A 57-year old woman presented with a 10-mo history of left lower quadrant abdominal pain and a 2-mo history of bloody stools. She had a significant past medical history of asymptomatic schistosomiasis japonica and constipation. A colonoscopy showed an exophytic fragile neoplasm with an ulcerating surface in the sigmoid colon. During the radical operative procedure, we noted the partially encircling tumor was located in the distal sigmoid colon, and extended into the serosa. Succedent pathological analysis demonstrated the diagnosis of sigmoid colonic ulcerative tubular adenocarcinoma, and showed deposited ova of Schistosoma japonicum in both tumor lesions and mesenteric lymph nodes. Three days after surgery the patient returned to the normal bowel function with one defecation per day. These findings reveal that deposited schistosome ova play a possible role in the carcinogenesis of colorectal cancer.

Keywords: Schistosomiasis japonica; Sigmoid colonic carcinoma; Deposited schistosome ova