Morphology is the microscopic evaluation of the visual appearance of cells, searching for abnormalities in size or shape. Immunohistochemistry (IHC) is the process of staining cells utilizing labels that bind to specific proteins. The presence or absence of staining indicates the type of cell, and may suggest a disease state. On its own, IHC may not be enough to make a diagnosis, but in conjunction with morphology, it is a critical initial step for proper diagnosis. We have a continuously expanding catalog of over 200 IHC stains, useful in the assessment of such diseases as leukemia, lymphoma, breast cancer and lung cancer. Our predictive and prognostic stains include estrogen and progesterone receptors, HER2, Ki-67 and PD-L1 for immunotherapy.