Immunohistochemistry does not necessarily mean that you have cancer, and a comprehensive analysis is needed based on the results of the test. Immunohistochemistry is a technique of immunohistochemical staining, which is needed to make a clear diagnosis of a tumor during treatment. However, not all specimens examined by immunohistochemistry are cancerous. For routine pathology, HE staining is used, which relies solely on light microscopic identification by the human eye. For tissues of unclear origin, further verification is required, and histochemical methods are recommended to further determine their origin and lesions. If immunohistochemistry is performed, some tumors can be excluded, some can be identified, and even the source and degree of differentiation, etc. can be clarified. Therefore, immunohistochemical staining technique is a diagnostic technique and is not the main factor in determining the tumor.