Peter A. Miescher The skin has always been one of the major targets to clinicians interested in immunology. Initially, the main focus was centred on allergic conditions such as contact hypersensitivity and urticeria. Gradually, the spectrum of immunological conditions involving the skin increased, encompassing diseases such as Dermatitis Herpetiformis, Erythema Muitiforme, Cutaneous Bullous Disorders and Photo toxic Reactions. It has been the intention of the editors of Springer Seminars in Immu nopathology to cover the broad spectrum of immune phenomena encountered in dermatological diseases...