What is Immunohistochemistry and Its Role in Cancer Diagnosis?

Immunohistochemistry (IHC) is a technique that uses antibodies to detect specific antigens in tissue sections. In the context of cancer diagnosis, IHC can be used to identify tumor markers that are specific to certain types of cancers. For example, HER2/neu is a protein that is overexpressed in some breast cancers, and its detection can help guide treatment. IHC can also help differentiate between different types of tumors and provide information on the likely behavior of the cancer.