A case of Gastric cystic polyp mimicking early gastric cancer

In this study, we present a case of a 51-year-old man with a gastric lesion initially suspected to be early gastric cancer but was ultimately diagnosed as a Gastric cystic polyp (GCP). The patient underwent diagnostic endoscopic submucosal dissection (ESD) based on the lesion's appearance and characteristics. Detailed pathological and immunohistochemical analysis confirmed the diagnosis of GCP. A follow-up revealed no recurrence six months post-treatment.