Treatment: Complete excision for a classic Spitz nevus is curative and allows for a complete histological evaluation. Indeterminate lesions should be reexcised with conservative margins to make sure they have been completely removed. Spitz nevi in adults should all be excised to allow for complete histopathological examination. Unclassifiable or difficult to classify melanocytic tumors with features of both Spitz nevus and melanoma are best treated as if they were melanoma. The Breslow depth should be used to plan for appropriate therapy.