Squamous cell carcinoma, also known as epidermoid carcinoma, is mostly a malignant tumor growing on the surface of the skin. If this kind of squamous cell carcinoma on the skin surface is diagnosed, it needs to be removed by surgery as soon as possible. If it is detected early and does not break through the basement membrane, it still belongs to in situ cancer, and the effect of surgery is very good. However, if it is found late, the tumor is large and has broken through the basement membrane, there is a possibility of metastasis. At this time, the effect of surgery alone is poor, and radiotherapy is often needed.