This book shall assist the microscopist in a practical way, with the help of three mainstays, a. clinical information, b. the resources a standard histopathology laboratory may offer and c. the light microscope, to approach and solve the diagnostic problems he/she may face in the field of dermatopa­thology. In fact, this is the way in which the senior author of this book has been successfully working over thirty years in his capacity as director of a private dermatopathology laboratory.