title: Complete appendiceal intussusception induced by primary appendiceal adenocarcinoma in tubular adenoma: a case report.
abstract: A case of complete intussusception induced by appendiceal carcinoma is reported. The patient was a 49-year-old man complaining of rectal bleeding. Barium enema and colonoscopy revealed a cecal polyp; it was interpreted as an inverted appendix with a tumor. Computed tomography showed an invaginated appendix into the cecal cavity. During surgery, the appendix was found to be inverted completely into the cecum; ileocecal resection with regional lymph node dissection was performed. Microscopic examination revealed well-differentiated adenocarcinoma in tubular adenoma. Diagnosis of intussusception with carcinoma of the appendix is often difficult because appendiceal carcinoma with intussusception of the appendix is a rare condition. Although this condition can be diagnosed by radiographic imaging or colonoscopy, computed tomography has also been useful. The clinical manifestation of appendiceal intussusception with primary appendiceal tumor resembles a large cecal polyp, but its treatment differs greatly. Failure to recognize this condition may result in unexpected complications such as consequent peritonitis in case of endoscopic removal.
authors.affiliation: Department of Surgery, Gunma Cancer Center Hospital, Ohta, Gunma, Japan. minoru@gunma-cc.jp
authors.forename: Minoru
authors.initials: M
authors.lastname: Takahashi
authors.forename: Toshio
authors.initials: T
authors.lastname: Sawada
authors.forename: Takahiro
authors.initials: T
authors.lastname: Fukuda
authors.forename: Taiki
authors.initials: T
authors.lastname: Furugori
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Kuwano
mesh_terms: D000230:Adenocarcinoma / Q000150:complications* / Q000601:surgery; D018253:Adenoma, Villous / Q000150:complications* / Q000601:surgery; D001063:Appendiceal Neoplasms / Q000150:complications* / Q000601:surgery; D001065:Appendix; D002429:Cecal Diseases / Q000209:etiology* / Q000601:surgery; D006801:Humans; D007443:Intussusception / Q000209:etiology* / Q000601:surgery; D008197:Lymph Node Excision; D008297:Male; D008875:Middle Aged