Immunohistochemistry is not needed only when the biopsy result is bad; immunohistochemistry is generally needed for benign lesions as well, so as to distinguish them from bad malignant lesions. Pathological biopsy is mainly to distinguish the benign and malignant nature of the disease. If microscopic observation reveals the presence of heterogeneous cells in the lesion tissue, it is likely to be a high-grade lesion, and further immunohistochemistry is often needed to examine and more accurately find out the type of the lesion, e.g., adenocarcinoma, squamous cell carcinoma and so on. Immunohistochemistry results can also further guide the development of a treatment plan, as well as the initial prognosis of the disease. Doctors will choose the treatment plan based on the immunohistochemistry results and actively adopt treatments, such as surgery, radiotherapy, chemotherapy, etc., in order to control the disease at an early stage. Patients are advised to cooperate with their doctors to undergo further examination and take treatment according to their condition after a clear diagnosis is made.