Histopathological examination mainly refers to the lesioned tissue obtained through surgical excision, lumpectomy, or fine needle puncture, and the standardized histopathological section made through a series of tissue processing such as extraction, fixation, dehydration, transparency, as well as wax immersion, embedding, sectioning and staining, etc., which is observed under the microscope, and a clear The histopathological section is observed under the microscope, and a clear pathological diagnosis is given according to the changes of the tissue structure and morphology, so as to guide the clinician to provide targeted treatment according to the pathological examination results. Histopathological examination is widely used in clinical practice, and it is a kind of gold diagnosis and gold standard, especially for tumor examination, which can judge the prognosis and guide clinical treatment.