A non-neoplastic polyp that arises from the stomach and is characterized by the presence of smooth muscle branching bands, and hyperplasia with cystic dilatation of the foveolar epithelium. The disease is Monarch Disease Ontology term MONDO_0006366 (Peutz-Jeghers polyp of the stomach). Also known as: Gastric Peutz-Jeghers polyp.