Epithelial skin tumors are extremely diverse. Benign tumors, which only require simple excision, have many pathogenic (hamartomas, virus-induced tumors, etc.) as well as anatomical origins (tumors arising from the numerous adnexae of the skin). Most malignant tumors are only locally malignant, but some of them have a particularly invasive and recurrent behaviour, requiring adapted surgical resection. Other tumors present a more marked malignancy and require a more complex therapeutic strategy. In every case, surgical resection is an essential step in the diagnosis and treatment of these tumors.