Heterogeneous cells are generally cells that are different from normal cells and have the potential to transform into cancer cells. Immunohistochemistry can be used to determine the nature and origin of the cells and to guide further medication. 1. Determine the nature of the cells: Determine the benign or malignant nature of the heterogeneous cells, such as whether the lesions in the lymph nodes are reactive hyperplasia or tumorigenic hyperplasia. 2. Determine the source of the tumor: different tumor cells have different specific antibodies on their surface. Through the detection of antibodies, we can know the real source of tumor cells, such as whether they are from epithelial, mesenchymal, endocrine, lymphatic or neural origin, so as to ensure the reliability of pathological diagnosis. 3. Guiding the clinical use of drugs: when a certain tumor has been diagnosed, the molecular alterations expressed by different patients are different for the same tumor. Immunohistochemistry can more accurately determine the application range of chemotherapy or molecular targeting drugs for patients, and provide the basis of screening for the next step of more accurate testing and treatment. After the discovery of heterogeneous cells, avoid overwork and late nights, and develop good living habits. Follow the doctor’s recommendations for regular checkups to clarify the diagnosis in a timely manner.