have presented a host of fungal, viral, and bacterial infections of the skin. In the last decade, immunohisto- chemistry has played an increasingly important role for routine diagnosis, prognosis, and research. The complexity of all skin disorders makes it imperative to understand IHC and the different dis- ciplines that are required by today's der- matopathologists. An entire book could be dedicated to this subject. This paper will attempt to give a small overview of the use of commonly used antibodies and phenotyping in the modern dermato- pathology laboratory. Antibodies Commonly Used