Cytoplasmic inclusions are identified using various histological staining techniques. For example, glycogen can be detected with the Periodic Acid-Schiff (PAS) stain, which colors glycogen magenta. Lipid droplets can be visualized using Oil Red O or Sudan stains, which selectively stain lipids. Pigments like melanin are usually identified by their natural color under the microscope, but special stains and techniques like Perl's Prussian blue can highlight hemosiderin.
