Endoscopic ultrasound-guided fine needle aspiration for the diagnosis of bowel endometriosis: a case report

Takao Miwa, Takuji Iwashita, Masashi Aiba, Takahiro Kochi, Katsuhisa Toda, Noriaki Nakamura, Naoki Katsumura, Masahito Shimizu


Bowel endometriosis is a condition caused by endometrial glands and stroma infiltrating the bowel wall and reaching the subserous fat tissue or the adjacent subserous plexus. A 42-year-old woman with changes in stool habits, nausea, and stomach aches experienced complete obstruction in the rectum. Endoscopic ultrasound demonstrated a low echoic lesion outside the rectal mucosa and endoscopic ultrasound-guided fine needle aspiration confirmed the diagnosis of bowel endometriosis. The clinical characteristics of bowel endometriosis are unspecific and this condition is sometimes misdiagnosed as a malignant tumor, irritable bowel syndrome, or any other colorectal disorder. Our aim is to show that endoscopic ultrasound-guided fine needle aspiration might be helpful for bowel endometriosis diagnosis and exclusion of other malignant disease.


bowel endometriosis; bowel obstruction; endoscopic ultrasound-guided fine needle aspiration; ileus

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DOI: http://dx.doi.org/10.11152/mu-2000