A Case of Small Intestinal Endometriosis Detected by Ultrasonography

K Iwashita, Megumi Mikoshiba, Masanori Miyashita, A Komatsu, Kanehiko Kumagai, Tomofumi Watanabe, Shinji Okaniwa, Han‐Seung Yoon
2015 · vol. 40(6) , pp. 670–676 · W2566954704
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⚙ AI-generated summary by claude@2026-07+body, 2026-07-15 ⓘ

This case report describes a 44-year-old woman with small intestinal endometriosis, diagnosed via ultrasonography showing a submucosal tumor-like lesion with heterogeneous echogenicity, leading to partial small bowel resection and histological confirmation.

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⚙ AI-generated deep summary by claude@2026-07, 2026-07-15 · read from full text ⓘ

This case report describes a 44-year-old woman with epigastric pain and vomiting in whom small intestinal endometriosis was detected using abdominal ultrasonography. CT showed dilated small bowel with a mass-like wall thickening in the left lower abdomen consistent with a cause of ileus, and ultrasound identified a 25×15 mm intraluminally convex mass with low echogenicity, mixed high-echo components, and heterogeneity, interpreted preoperatively as a submucosal tumor because it appeared to arise mainly from the fourth layer (proper muscle layer). No blood flow signals were seen on Doppler, and the patient underwent small bowel partial resection; pathology revealed thickened proper muscle layer with numerous endometrial-like glandular structures and surrounding endometrial stroma, leading to a diagnosis of intestinal endometriosis. The paper relates to endometriosis because it documents ultrasound visualization and pathological confirmation of small intestinal endometriosis presenting as an obstruction-like submucosal tumor.

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A Case of Small Intestinal Endometriosis Detected by Ultrasonography - - Iwashita Kazuhiro - Department of Radiological Technology, Iida Municipal Hospital - - Mikoshiba Megumi - Department of Radiological Technology, Iida Municipal Hospital - - Miyashita Masanori - Department of Radiological Technology, Iida Municipal Hospital - - Komatsu Akihiko - Department of Radiological Technology, Iida Municipal Hospital - - Kumagai Kanehiko - Department of Radiological Technology, Iida Municipal Hospital - - Watanabe Tomofumi - Department of Radiological Technology, Iida Municipal Hospital - - Okaniwa Shinji - Department of Radiological Technology, Iida Municipal Hospital - - Yoon Han-Seung - Department of Radiological Technology, Iida Municipal Hospital Bibliographic Information - Other Title - - 超音波検査で描出し得た小腸子宮内膜症の1例 - Published - 2015 - DOI - - 10.11272/jss.40.670 - Publisher - Japanese Society of Sonographers Search this article Description 腸管子宮内膜症は近年子宮内膜症の増加に伴い報告例も増加傾向にあるが，超音波検査を施行した腸管子宮内膜症の報告例は少ない．今回超音波検査にて描出し得た小腸の腸管子宮内膜症の1例を経験したので報告する．症例は44歳女性，心窩部痛と嘔吐を主訴に当院を受診した．腹部CTでは小腸は拡張しており，左下腹部の小腸に腫瘤状の壁肥厚を認め腸閉塞の原因と考えた．超音波検査でも左下腹部の小腸に内腔側へ凸となる最大径25×15 mmの腫瘤を認めた．腫瘤は粘膜下層に比べて低エコーで内部に高エコーが混在し不均一であり，第4層の固有筋層を主座とする粘膜下腫瘍を考えた．ドプラでは血流信号を認めなかった．以上より粘膜下腫瘍による腸閉塞と診断し，小腸の部分切除術を施行した．切除標本の割面像では筋層から漿膜下組織にかけて淡褐色の病変を散在性に認め，病理組織学的所見で肥厚した固有筋層内に多数の子宮内膜様腺管構造と周囲に子宮内膜間質を認めることから腸管子宮内膜症と診断した．腸管子宮内膜症の主座は固有筋層と漿膜下組織であり，それを反映し超音波検査では固有筋層を主座とする粘膜下腫瘍様病変として描出されたと考えられた． Journal - - Japanese Journal of Medical Ultrasound Technology - Japanese Journal of Medical Ultrasound Technology 40 (6), 670-676, 2015 Japanese Society of Sonographers Details 詳細情報について - - CRID - 1390282680256354304 - - NII Article ID - 130005126004 - - ISSN - 18814514 - 18814506 - - Text Lang - ja - - Data Source - - JaLC - CiNii Articles - - Abstract License Flag - Disallowed

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