According to nuclear schizophrenia, only G3 stage with K167 greater than 20% is called neuroendocrine carcinoma. Although G1 and G2 stages are not called neuroendocrine carcinoma, they still have the characteristics of malignant tumors, and should be detected and treated as early as possible. Neuroendocrine tumors are tumors that originate from stem cells and have neuroendocrine markers and are capable of producing biologically active amines and/or peptide hormones, mainly including pancreatic neuroendocrine tumors and gastrointestinal neuroendocrine tumors. Symptoms of neuroendocrine tumors are more complex, such as dysphagia, abdominal pain, bloating, diarrhea, abdominal mass, or skin flushing, sweating, asthma, diarrhea, hypoglycemia, and diabetes. Treatment can be surgical for localized stage, and chemotherapy and targeted therapy for locally advanced and metastatic. If detected and treated early, about half of the patients have a 5-year survival.