• Tae Un Kim, Su Jin Kim, and Cheol Woong Choi.
• Department of Radiology Yangsan, Korea.
• Medicine (Baltimore). 2021 Oct 29; 100 (43): e27610e27610.

IntroductionEndoscopic resection of a follicular lymphoma (FL) presenting as a gastric subepithelial tumor (SET), along with periodic follow up can be a treatment option because gastrointestinal FL cells tend to reside in the primary site, which may explain its indolent nature.Patient ConcernsA gastric lesion was found incidentally during a screening endoscopy in 73-year-old woman without any gastrointestinal symptom.DiagnosisThe patient was diagnosed with a grade I FL that was 1.4 cm large, at the greater curvature of lower-body.InterventionWe performed underwater endoscopic mucosal resection (UW-EMR), and there was no serious complication, such as bleeding and perforation.OutcomesComplete en bloc resection was achieved with UW-EMR. Follow-up endoscopic biopsy after 3 months revealed no residual tumor on the resection site.ConclusionUW-EMR may be a simple and safe resection method for gastric FL without metastases, that measure >1 cm.Copyright © 2021 the Author(s). Published by Wolters Kluwer Health, Inc.

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