Immunohistochemistry examination can determine the nature of the tumor, its growth rate and the degree of malignancy. For those who are suspected of having tumors, the diseased tissues are usually taken by surgical puncture or other means for pathological examination, through which the nature of the tumor can be initially judged, whether it is benign or malignant. However, some patients are more complicated, then they need to do further immunohistochemistry and check the tumor markers, so as to clarify the nature of the tumor, and according to the markers, they can judge the growth rate of the tumor as well as the degree of malignancy of the tumor. Especially for those who need radiotherapy and chemotherapy in the later stage, personalized targeted therapy and chemotherapy can be formulated through immunohistochemistry.