Zaragoza, España
A partir de una amplia revision bibliografica, se hace una descripci6n de los tu mores pre-malignos originarios de la epidermis superficial. Se proponen alternativas de actuaci6n diagn6stica.
From a broad review of the literature we develop a description of the pre-malignant tumors which has its origin in the superficial epidermis. Diagnostic alternatives are proposed.