title: [A case of rectal implantation cyst diagnosed by EUS and EUS-guided FNA].
abstract: A 73-year-old woman was referred to our hospital complaining of bloody stool. She had undergone high anterior resection with the double stapling technique for a sigmoid colon cancer 2 years prior to this admission. Colonoscopy revealed a soft submucosal tumor, 4cm in size, on the anal side of the previous anastomosis in the rectum. EUS revealed a cystic lesion located in the third and fourth layers of the rectal wall. EUS-FNA was performed, and the content of the cystic lesion was transparent mucinous liquid. Histologically, the specimen revealed PAS and Alcian blue-positive mucinous material and a small number of inflammatory cells such as foamy macrophages. Therefore, this cystic lesion was diagnosed as a rectal implantation cyst.
authors.affiliation: Department of Gastroenterology, Aso Iizuka Hospital. sitabah1@aih-net.com
authors.forename: Soichi
authors.initials: S
authors.lastname: Itaba
authors.forename: Kazuya
authors.initials: K
authors.lastname: Akahoshi
authors.forename: Yasuaki
authors.initials: Y
authors.lastname: Motomura
authors.forename: Risa
authors.initials: R
authors.lastname: Iwao
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Tanaka
authors.forename: Keishi
authors.initials: K
authors.lastname: Komori
authors.forename: Takashi
authors.initials: T
authors.lastname: Osoegawa
authors.forename: Masaru
authors.initials: M
authors.lastname: Kubokawa
authors.forename: Terumasa
authors.initials: T
authors.lastname: Hisano
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Matono
authors.forename: Masafumi
authors.initials: M
authors.lastname: Oya
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Nakamura
mesh_terms: D000368:Aged; D044963:Biopsy, Fine-Needle / Q000379:methods*; D003110:Colonic Neoplasms / Q000601:surgery; D003560:Cysts / Q000175:diagnosis*; D019160:Endosonography; D005260:Female; D006801:Humans; D011183:Postoperative Complications; D012002:Rectal Diseases / Q000175:diagnosis*