The aim of the study is to evaluate the activity and efficacy of anti PD-1 antibodies in adolescent, childhood and young adult with early and advanced melanomas through a multicenter transnational European retrospective analysis Clinical outcomes will be retrospectively retrieved beginning from the primary diagnosis of melanoma. Clinical outcomes will be retrospectively evaluated starting from the time of start of treatment for up to a the most recent follow-up. Data collected will include demographic information, disease history, baseline conditions, clinical outcomes of interest.
