title: Diagnostic value of endoscopic ultrasonography in an unusual case of gastric cyst.
abstract: Using endoscopic ultrasonography, we diagnosed a gastric antral submucosal cyst with a papillous protrusion in a 71-yr-old woman, apparently the first such case to be detected by this method. Endoscopic ultrasonography demonstrated a well-marginated hypoechoic area with papillary tumor in the submucosal layer that did not extend to the muscularis propria. The lesion was diagnosed as a gastric submucosal cyst. CT and transabdominal ultrasound each failed to detect the intracystic papillary tumor. Follow-up endoscopic ultrasonography performed 6 months later revealed an increase in the diameter of the cyst and the papillary tumor. The patient then underwent a partial gastrectomy for a suspected malignancy. The resected specimen showed a cystic lesion with papillary tumor. Although no malignancy was present, examination of cross-sections of the resected specimen gave results consistent with the endoscopic ultrasonographic findings. Endoscopic ultrasonography is thus useful in assessing the nature of a submucosal gastric cyst in detail and in monitoring patients with this lesion.
authors.affiliation: Third Department of Internal Medicine, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
authors.forename: M
authors.initials: M
authors.lastname: Tanaka
authors.forename: K
authors.initials: K
authors.lastname: Akahoshi
authors.forename: Y
authors.initials: Y
authors.lastname: Chijiiwa
authors.forename: I
authors.initials: I
authors.lastname: Sasaki
authors.forename: H
authors.initials: H
authors.lastname: Nawata
mesh_terms: D000368:Aged; D003560:Cysts / Q000000981:diagnostic imaging* / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D005743:Gastrectomy; D005773:Gastroscopy / Q000379:methods*; D006801:Humans; D013272:Stomach Diseases / Q000000981:diagnostic imaging* / Q000601:surgery; D014463:Ultrasonography