Benign tumors usually do not recur after resection. There are great differences between benign and malignant tumors in terms of growth pattern, biological characteristics and prognosis. Benign tumors are mainly local expansion growth, slow growth, and most of them have intact envelope and no obvious invasion phenomenon. Except for the huge growth and compression symptoms on the surrounding organs, there are no obvious systemic symptoms and no lymphatic or hematogenous metastasis will occur. The principle of treatment for benign tumors includes complete excision of the tumor envelope, and if necessary, a small amount of normal tissue outside the envelope can be removed to prevent local recurrence. Although the chance of recurrence of benign tumors after resection is relatively low, pathological examination should be done after resection of benign tumors to clarify the pathological diagnosis and to avoid mistaking malignant tumors for benign tumors. There are also some special cases, such as vocal cord papilloma in adults, bladder papilloma, ovarian dermatomal cyst, etc. Although these are benign tumors, there is a risk of potential malignancy or low-grade malignancy, so the scope of resection during surgery is also more extensive to prevent recurrence.