Biopsy is not necessarily cancer. When a person goes to the hospital for examination, such as gastroscopy or colonoscopy, polyps or lesions are found in the stomach lumen or in the colon, tissue needs to be taken out for pathological examination, which is called biopsy. If there is a polyp in the stomach, a portion of the polyp will be clamped out for examination to find out the condition of the polyp, whether it is a benign polyp or a malignant nodule. There are also cases where the diagnosis is more complicated, such as inflammatory bowel disease, where the diagnosis cannot be confirmed by examination, and some of the suspected parts can be taken for pathological examination under colonoscopy. There may also be cases where the doctor suspects that the patient has cancer and needs to take some tissue for biopsy, such as in the case of lymphoma where the lymph nodes on the surface of the body are biopsied for examination.