Dermatopathology is the study of diseases and disorders of the skin by laboratory examination of cells. A dermatopathologist diagnoses diseases of the skin by laboratory study of skin tissues under a microscope. This specialist may consult with a primary physician regarding the monitoring and treatment of skin disorders. Whether the source of the skin disorder is an infection, a reaction of the immune system, a cancerous lesion, or a degenerative disease, the dermatopathologist can examine and interpret the results of microscopic tests and offer recommendations for treatment.