This disease is a type of polyp that is commonly referred to as a benign lesion. It is generally not a serious type of polyp disease. However, since this polyp can deteriorate, it still needs to be treated when it is found. Adenomatous polyps are a problem that needs to receive attention. These lesions are histologically classified as tubular adenomas, tubular villous adenomas, and villous adenomas. Tubular adenoma is one of these three classifications. It has the potential to become cancerous, depending on size, histologic type and degree of developmental abnormality: a 1.5 cm tubular adenoma has a 2% risk of cancer, with a progressively higher risk for larger tubular adenoma adenomas; a tubular adenoma that appears jagged is one with greater malignancy and may develop from a hyperplastic polyp. Most polyps are asymptomatic. Rectal bleeding is usually insidious, rarely occurs, and is the most common symptom. Large lesions may present with cramping, abdominal pain, or obstruction. Rectal polyps can be palpated by examination. Occasionally polyps on long tips may prolapse through the anus. Large villous adenomas may rarely cause watery diarrhea and may lead to hypokalemia. Diagnosis of colon polyps is usually made by colonoscopy. Barium enemas, especially double contrast, are effective, but colonoscopy is preferable because polyps can also be removed during the procedure. For the question of whether a rectal tubular adenoma is serious or not, two things need to be clarified: one is that this adenoma may become cancerous at a future time, and the other is that it may have already occurred. Therefore, the appearance of rectal tubular adenoma needs to be removed promptly and pathological examination is routinely performed to clarify the nature of the disease. Whether it has developed malignancy or not, it is best to remove it, and if it cannot be removed it needs to be reviewed regularly.