The results of immunohistochemistry are usually available in a week or so, and the results of normal paraffin pathology are available in a week or so, and if immunohistochemistry needs to be continued, the results will not be fully available until about two weeks. For example, if a neuroendocrine tumor is considered to be of insulin origin, that is, insulinoma, insulin-labeled immunohistochemistry will be done again, and if the test result is positive, insulinoma can be diagnosed. It is also possible that after the nature of the tumor has been clearly diagnosed, immunohistochemistry can be used for the next step of treatment, such as immunohistochemistry for breast cancer, which is positive for estrogen and progesterone receptors and can be treated with endocrine drugs such as tamoxifen.