Metastatic cancer of lymph nodes is a very serious disease, which is often the clinical manifestation of tumor patients in advanced stage, so it is very serious. The so-called lymph node metastatic cancer refers to the occurrence of malignant tumor in extra-nodal organs, and the malignant tumor metastasizes to distant lymph nodes through lymph node fluid, causing swelling of lymph nodes in corresponding areas, for example, lung cancer patients can cause swelling of lymph nodes in the right supraclavicular fossa. Patients with stomach cancer or esophageal cancer can cause swelling of lymph nodes in the left supraclavicular fossa through lymph node metastasis, and such lymph node swelling is often painless, but hard in texture and poor in mobility. Therefore, once lymph node metastasis occurs in malignant tumors, it often means that the disease has spread and the opportunity of surgical treatment is lost, and often only chemotherapy, radiotherapy and symptomatic support treatment can be given, and the patient’s survival period is relatively short.