[Mixed tumors of the salivary and cutaneous glands. Studied by silver technics]

The authors study salivary and cutaneous mixed tumors in a comparative way. They use silver impregnation techniques, specially those developed in spanish and argentine schools. As a result, they obtain a morphological richness using those techniques. One of these, specially Del Rio Hortega-Polak allow to document the preponderant role of the myoepithelial cells in the genesis of these tumors.