title: A case of endometriosis of the appendix with adhesion to right ovarian cyst presenting as intussusception of a mucocele of the appendix.
abstract: Endometriosis of the appendix is rare, and we present a case of endometriosis of the appendix with adhesion to right ovarian cyst presenting as intussusception of a mucocele of the appendix in a 35-year-old woman with no associated sign of endometriosis. Colonoscopy revealed intussusception-like change and mucosal defect in the mucosa at the orifice of the appendix. Abdominal computed tomography showed a low-density lesion, which seemed to be right ovarian cyst. However, as the appendix was located near this site, differentiation between ovarian cyst and mucocele of the appendix was difficult. Laparoscopic examination disclosed blue berry spots on the Douglas cul-de-sac and right ovarian cyst, and the appendix was atrophied and hardened and tightly adhered to the right ovary. Laparoscopic appendectomy and partial cecectomy was performed, and on pathologic examination, thickening and fibrosis of the muscle layer owing to endometriosis were judged to have caused intussusception-like changes.
authors.affiliation: Division of Colorectal Surgery, National Cancer Center Hospital, Chuo-ku, Tokyo, Japan.
authors.forename: Tomonori
authors.initials: T
authors.lastname: Akagi
authors.forename: Seiichiro
authors.initials: S
authors.lastname: Yamamoto
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Kobayashi
authors.forename: Shin
authors.initials: S
authors.lastname: Fujita
authors.forename: Takayuki
authors.initials: T
authors.lastname: Akasu
authors.forename: Yoshihiro
authors.initials: Y
authors.lastname: Moriya
authors.forename: Tomoyasu
authors.initials: T
authors.lastname: Kato
mesh_terms: D000328:Adult; D001062:Appendectomy / Q000379:methods; D001065:Appendix / Q000473:pathology* / Q000601:surgery; D002432:Cecum / Q000601:surgery; D003113:Colonoscopy; D003937:Diagnosis, Differential; D004715:Endometriosis / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D005260:Female; D006801:Humans; D007443:Intussusception / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D010535:Laparoscopy; D009078:Mucocele / Q000150:complications / Q000175:diagnosis / Q000601:surgery; D010048:Ovarian Cysts / Q000150:complications* / Q000175:diagnosis / Q000473:pathology*; D000267:Tissue Adhesions / Q000150:complications* / Q000175:diagnosis / Q000601:surgery; D014057:Tomography, X-Ray Computed