Histological analysis is a cornerstone of disease diagnosis. By examining tissue samples under a microscope, pathologists can identify abnormalities in cellular morphology that indicate diseases such as cancer, inflammatory conditions, and infectious diseases. Techniques like immunohistochemistry (IHC) and in situ hybridization (ISH) provide additional layers of information by detecting specific proteins or nucleic acids within the tissue sections, aiding in the identification of disease subtypes and appropriate therapies.