Malignant epithelial tumors: Part I. Pathophysiology and clinical features.

Epithelial skin cancer is a major burden for western societies. In the 21(st) century there will be a steady increase in the incidence of these tumors in the elderly population. The article summarizes the pathophysiology of epithelial tumors and gives a systematic outline of the different clinical features of keratinocytic tumors. Furthermore, the article gives an overview of inherited syndromes that predispose to malignant epithelial tumors.