Testicular adenomatoid tumor immunohistochemistry is used to clarify the nature of the testicular adenomatoid tumor as well as to distinguish the nature of the malignant tumor cells. Testicular adenomatoid tumor is a benign neoplasm that occurs in the paratesticular tissue cells of the male testis, most of which grows in the area of the epididymis, while some may grow in the testicular leukomalacia and spermatic cords. It is usually a substantial mass, most of which is asymptomatic, and the growth rate of this tumor is slow. Immunohistochemistry is the abbreviation of immunohistochemistry, which mainly uses the basic principles of immunology to locate, qualify and quantify the antigens in the tissue cells, mainly to diagnose and identify the nature of the tumor, and if the diagnosis of malignant tumors is confirmed, it can also determine the primary site of malignant tumors, and carry out pathological typing of malignant tumors, which can provide the basis of the clinical treatment plan. The presence of testicular growths should be based on the results of immunohistochemistry, the choice of appropriate treatment.