Regression of gastric endoscopic submucosal dissection induced polypoid nodular scar after Helicobacter pylori eradication: A case report

BACKGROUND: Endoscopic submucosal dissection (ESD) is the treatment of choice for early gastric cancer and premalignant gastric dysplasia. In some cases, ESD induced ulcer heals as a polypoid nodular scar (PNS). These scars may make the physicians raise several clinical implications such as post-ESD neoplastic recurrence. CASE SUMMARY: We described a case of gastric ESD induced PNS which is regressed after Helicobacter pylori (H. pylori) eradication. A 58-year-old male patient was referred to the outpatient clinic for evaluation and treatment of gastric low-grade dysplasia (LGD). ESD was performed. A PNS was developed at the ESD site. An endoscopic biopsy was done and there was no histological evidence of remnant tumor or recurrence but a hyperplastic mucosal change. The PNS showed increase in size in follow-up endoscopy, and the biopsy specimen demonstrated H. pylori infestation. H. pylori eradication was done and the PNS was regressed. CONCLUSION: H. pylori eradication is considerable for the regression of PNS if H. pylori infestation is confirmed.