H&E Staining: Provides a general overview of tissue structure. Immunohistochemistry (IHC): Detects specific proteins within tissues using antibodies. In Situ Hybridization (ISH): Localizes specific nucleic acid sequences within tissues. Confocal Microscopy: Offers high-resolution, 3D images of tissues. Multiphoton Microscopy: Enables deeper tissue imaging with reduced photodamage.