Pathological examination operation process, including sampling (obtaining the tissue in the body), and then fixed, sectioned, stained, and observed under the microscope to clarify the nature of the lesion. Pathological examination is usually the tissue taken out of the living body to do pathological examination, the living body to take the lesion tissue including gastroscopy and enteroscopy biopsy, puncture biopsy, endometrial scraping, or surgical resection of the specimen, are all the specimens to be done for pathological examination. Cell specimens obtained by puncture are smeared directly, or through a series of operations such as centrifugation to make cytologic pathology sections, which the doctor observes under a microscope to see if the cell types are heterogeneous or diseased. Larger pieces of tissue should be fixed with formalin fixative, and the specimen should be observed, described, and measured in general, and then the tissue should be dehydrated, embedded, sectioned, and stained to make pathological sections, which will be observed under a microscope by a pathologist to make a diagnosis. Patients who need to do pathology examination should go to regular hospitals in time, under the guidance of professional doctors.