Revealing autoimmune gastritis: Polypoid nodule scar development after endoscopic submucosal dissection for early gastric cancer.

Endoscopic submucosal dissection (ESD), the standard treatment for early gastric cancer, typically results in homogeneous flat scars. However, in some cases, polypoid nodule scars (PNS) may develop, complicating the cancer recurrence assessment. This case report describes a 60-year-old man with a history of infection who underwent two ESD procedures: first for early antral gastric cancer and then for gastric body adenoma.