Pathology plays a crucial role in the diagnosis and classification of diseases. Immunohistochemistry (IHC) enables the detection of specific proteins in tissue sections, providing valuable information in cancer diagnosis and tumor classification. Histochemistry identifies specific components in tissues by staining cellular structures with chemical reactions. Hematoxylin & eosin staining reveals the overall morphology of tissues, providing a foundation for histopathological analyses. These methods ensure accurate disease diagnosis in pathological examinations.