Pathological diagnosis is the “gold standard” and the final diagnosis. Patients often do not understand why pathological examination is necessary. In fact, pathological examination is to obtain the final diagnosis, especially for tumor diagnosis, which is the most authoritative in determining the benignity and malignancy of tumors. Many malignant tumors are often discovered by outpatients during pathological examination, and many of them are at the early stage of lesions, so that they can be treated timely and achieve good results. For example, early cervical cancer refers to cervical cancer lesions limited to mucosal layer or superficial layer of mucosa. Moreover, some advanced stage patients lose the chance of surgery, and even if they can be treated by surgery, they must be given chemotherapy or radiotherapy after surgery, which is a great burden in both economic and physical aspects. The importance of pathological examination can be seen from the fact that early stage cancer can only be finally diagnosed through pathological examination, which no other examination methods can do. Some patients do not pay enough attention to pathological examination and often give up the opportunity of pathological examination, which can easily leave great hidden danger.