[Merkel cell carcinoma of the skin].
This study reports five cases of Merkel-cell carcinoma of the skin. Then the authors review the present state of the art from the data already available in the literature concerning this malignant primary skin tumor. A part from local excision, no standard procedures are described. The literature provides a lot of discrepancies concerning the additional treatments such as lymph mode excision, radio and chemotherapy. The prognosis of this tumor remains poor because of a high incidence of local recurrence, a frequent spread to regional lymph modes and the development metastases.