Symptomatically, the lesion of gastric cancer is located in the stomach, and sometimes supraclavicular lymph node metastasis may occur. If supraclavicular lymph node metastasis occurs, it is necessary to consider whether it is inflammatory or metastatic, and finally it is necessary to go through puncture biopsy to determine whether there is any metastasis. Physical signs include the presence of a mass, a combination of imaging, gastroscopy to evaluate the mass in the stomach, and possibly a CT scan of the lungs to detect any metastases in the lungs and lymph node metastases in the mediastinum. A CT scan of the abdomen may be performed to detect any metastases in the liver and retroperitoneal lymph nodes. A bone scan is done to rule out any bone metastases, and an MRI of the skull may be done to rule out intracranial space. If the economic condition is better, whole body PET-CT scan can be done. Therefore, whether stomach cancer has metastasis or not needs to be evaluated comprehensively.