A Case of Rectal Cancer Associated with Japanese Schistosomiasis

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  • Tomihara Kazuki
    Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University
  • Mizuuchi Yusuke
    Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University
  • Sada Masafumi
    Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University
  • Nagayoshi Kinuko
    Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University
  • Nagai Shuntaro
    Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University
  • Yamada Yutaka
    Department of Anatomic Pathology, Pathological Sciences, Graduate School of Medical Sciences, Kyushu University
  • Oda Yoshinao
    Department of Anatomic Pathology, Pathological Sciences, Graduate School of Medical Sciences, Kyushu University
  • Nakamura Masafumi
    Department of Surgery and Oncology, Graduate School of Medical Sciences, Kyushu University

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  • 日本住血吸虫卵を認めた直腸癌の1例

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<p>A 73-year-old man underwent colonoscopy for an examination of anemia, which revealed a type 2 lesion on the anterior wall of rectum Ra-Rb. It was diagnosed as adenocarcinoma on biopsy. He had no history of parasitic disease, although he had lived in an area where Schistosoma japonicum used to be epidemic. Preoperative examination revealed no evidence of schistosomiasis, and laparoscopic-assisted abdominal perineal rectal amputation was performed. The pathological diagnosis was T3N0M0 Stage II. However, Schistosoma japonicum eggs were found in the submucosa of the surrounding normal area. Schistosoma japonicum is a parasitic disease caused by Oncomelania hupensis nosophora with dermatitis, gastrointestinal symptoms, and cirrhosis in severe cases. Thanks to the eradication of Oncomelania hupensis nosophora, there have been no cases of infection in Japan since 1978. However, there have been several case reports in which Schistosoma japonicum eggs were found in pathological specimens of colorectal cancers since then. In the present case, Schistosoma japonicum eggs happened to be found in a resected rectal cancer specimen. We report the case, with a review of the literature.</p>

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