This site, a highlight of the Dermatology Internet Service (DermIS), provided by the Dermatology Department of the Friedrich-Alexander-University of Erlangen-Nurnberg (Germany) School of Medicine, is a compendium of hundreds of browsable and searchable photographs of skin conditions from Abrikossoff's Tumor to Zoster Varicellosus. Image groups may be accompanied by synonyms for the condition, Unified Medical Language System (UMLS) terms, and a definition. Each image includes an assessment of its quality for teaching, and may be accompanied by brief descriptive information. The quality, number and breadth of images, though sometimes difficult for a general audience to stomach, is what makes the Atlas an excellent teaching tool. Note that the site is available in English and German, and that a knowledge of dermatological disease terminology is assumed.