If cancer patients have lymphatic metastasis, if they can be treated actively, the hope of survival for more than 3 years is about 70%, and the hope of survival for more than 5 years is about 30%, so active treatment and prognosis are closely related. If lymph node metastasis occurs in cancer, it usually belongs to the middle and late stage, but for the local lymph node metastasis, there is still a chance of surgical treatment. Therefore, early detection, early diagnosis and early treatment are the key to cure and long life.