Epithelial polyps are the most common type of gastric polyp. They include fundic gland polyps (FGPs), hyperplastic polyps, and adenomatous polyps. Other less common epithelial lesions that may appear as polyps include neuroendocrine tumors (formerly called carcinoids), ectopic pancreatic tissue, and pyloric adenomas.

Gastric polyps are lesions that protrude from the surface of the gastric mucosa. Gastric polyps are often discovered incidentally, occurring in 2-3% of patients undergoing upper gastrointestinal endoscopy, and rarely cause symptoms such as bleeding or slow digestion. However, proper diagnosis and treatment are important because some polyps have a risk of cancer.

These days, more and more people are suffering from neuroendocrine tumors (NETs), especially in the gastrointestinal tract. The disease is very difficult to diagnose, mostly when it is detected at a late stage, the prognosis is severe, and treatment is difficult.