A case of endometriosis-induced appendiceal intussusception

Yoshiki Ogane, Yuki Haga, Daisuke Satomi, Tomomi Ozaki, Koji Nishimura, Ayako Shingyouchi, Tatsuo Miyamura, Kenji Ito, Asami Abe, Satoru Kaneda, Minoru Tada, Masaaki Saito, Nobuyuki Sugiura
In: Progress of Digestive Endoscopy · 2022 · vol. 101(1) , pp. 64–66 · doi:10.11641/pde.101.1_64 · W4313417438
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⚙ AI-generated summary by gemini-2.5-flash-lite, 2026-06-12 ⓘ

This case report details the diagnosis and surgical management of a 48-year-old woman with endometriosis-induced appendiceal intussusception presenting as a cecal lesion.

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⚙ AI-generated deep summary by claude@2026-06, 2026-06-12 · read from full text ⓘ

The paper reports a case of a 48-year-old woman with a positive fecal occult blood test who underwent colonoscopy, which showed a steeply elevated cecal lesion. Using magnifying endoscopy with narrow-band imaging, the lesion appeared to have a type 1 pit pattern and was considered non-neoplastic, while endoscopic ultrasonography showed a continuous homogeneous hypoechoic lesion in the fourth layer; however, the authors stated that a submucosal tumor could not be excluded. Laparoscopic observation identified appendiceal intussusception, and partial appendectomy was performed; pathology demonstrated endometrial glands located in the muscularis propria, confirming appendiceal endometriosis. This paper is centrally about endometriosis — specifically, endometriosis-induced appendiceal intussusception.

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Abstract

We evaluated a 48-year-old woman presenting with a positive fecal occult blood test result. The patient underwent colonoscopy, which identified a steeply elevated lesion in the cecum. Magnifying endoscopy with narrow-band imaging revealed a type 1 pit pattern, considered non-neoplastic mucosa. Furthermore, endoscopic ultrasonography identified a continuous homogeneous hypoechoic lesion in the fourth layer. We could not exclude a submucosal tumor based on these examination results. Therefore, we observed the area laparoscopically, which revealed appendiceal intussusception. Consequently, we performed a partial appendicectomy. Pathological examination confirmed endometrial glands in the muscularis propria, consistent with appendiceal endometriosis. This case emphasized that we should consider endometriosis-induced appendiceal intussusception as a differential diagnosis in childbearing-age women with an appendiceal mass.
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症例 虫垂子宮内膜症による完全型虫垂重積の一例 2022 年 101 巻 1 号 p. 64-66 詳細 抄録 We evaluated a 48-year-old woman presenting with a positive fecal occult blood test result. The patient underwent colonoscopy, which identified a steeply elevated lesion in the cecum. Magnifying endoscopy with narrow-band imaging revealed a type 1 pit pattern, considered non-neoplastic mucosa. Furthermore, endoscopic ultrasonography identified a continuous homogeneous hypoechoic lesion in the fourth layer. We could not exclude a submucosal tumor based on these examination results. Therefore, we observed the area laparoscopically, which revealed appendiceal intussusception. Consequently, we performed a partial appendicectomy. Pathological examination confirmed endometrial glands in the muscularis propria, consistent with appendiceal endometriosis. This case emphasized that we should consider endometriosis-induced appendiceal intussusception as a differential diagnosis in childbearing-age women with an appendiceal mass. © 2022 一般社団法人 日本消化器内視鏡学会 関東支部

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endometriosis

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