Moderately differentiated carcinoma belongs to one of the pathological types of malignant tumors, which has nothing to do with tumor stage. From pathological analysis, malignant tumors can be divided into undifferentiated carcinoma, low differentiated carcinoma, moderately differentiated carcinoma and highly differentiated carcinoma, which are mainly used to reflect the differentiation degree of tumor cells, the higher the differentiation, the closer its morphology is to normal tissues, and the lower the malignancy. The staging of tumor is generally determined according to the tumor diameter, whether lymph node metastasis and distant metastasis occur, such as the TNM staging criteria commonly used in clinical practice. In moderately differentiated carcinoma, if the tumor diameter is relatively small and there is no lymphatic metastasis or distant metastasis, it belongs to early stage; if lymphatic metastasis has appeared, it belongs to middle stage; if lymphatic metastasis is found along with distant metastasis to other organs, it belongs to advanced stage. Patients with malignant tumor are suggested to go to hospital medical oncology department for examination in time to clarify the stage and pathological type of the disease, and actively cooperate with doctors for treatment.