What is reason to do biopsy of stomach?

A biopsy of the stomach is performed to diagnose various conditions, such as gastritis, peptic ulcers, or stomach cancer. It allows for the collection of tissue samples that can be examined microscopically for abnormalities, including the presence of Helicobacter pylori, which can cause ulcers. Additionally, a biopsy can help assess the severity of inflammation or other pathological changes in the gastric lining. Overall, it provides critical information that aids in determining appropriate treatment options.