Cutaneous melanoma (CM) is the skin cancer type with the worse prognosis. Although the exact cause of CM is not fully understood, numerous studies indicate that the presence of melanocytic dysplastic nevi (MDN) is an important risk factor for melanoma development. The approach of MDN and of multiple MDN is controversial, as the excision of all atypical lesions is impracticable, due to disfiguring and increased morbidity. In the case of these patients, dermatoscopy, which offers a detailed image of surface structures, increases diagnostic sensibility and reduces the number of useless biopsies of benign lesions, being an efficient screening and surveillance method.