Immunohistochemistry (IHC) is a laboratory technique used to visualize specific proteins in tissue samples. By using antibodies that bind to these proteins, scientists can identify their presence and location within the cells. This method is crucial in diagnosing diseases, especially cancers, as it helps pathologists understand the characteristics of tumors. In IHC, tissue sections are treated with special dyes that react with the antibodies. This creates a colored signal that can be seen under a microscope. The results provide valuable information about the cellular structure and biological processes, aiding in the development of targeted treatments and personalized medicine.