This is a training, natural history of disease, and screening protocol for the evaluation, treatment and follow-up of patients with dermatologic diseases and systemic diseases with cutaneous manifestations. This protocol was developed to allow subject enrollment for teaching purposes and to allow for second opinions regarding relatively complicated patients, and to allow for evaluation of non-invasive tools for the diagnosis and monitoring of cutaneous manifestations. This protocol promotes a critical link between the NCI, CCR Dermatology Branch and the local and national extramural medical communities.