Melanoma is the most aggressive skin cancer. Since diagnosis is visual, it is critical to evaluate if students acquire enough knowledge for early detection during medical school. To assess the melanoma knowledge of first-year (freshman) and sixth-year (senior) medical students, in a Brazilian Institution. It was a transversal and quantitative study. A questionnaire with sociodemographic data, knowledge about melanoma, and the habit of skin self-exam was filled out by medical students. A total of 128 first-year and 122 seniors students were included. All the sixth-year students knew melanoma as a skin cancer compared with 46.09% of the first-year students. Melanoma clinical characteristics were known by 30.51% of the freshman and 97.54% of seniors. However, they did not know the most usual site of melanoma occurrence (79.66% of first-year students and 24.59% of senior). About the skin self-exam, only 50% of first-year students and 53.28% of senior had the habit of doing it sometimes. Medical school was effective in providing knowledge about melanoma and its features. However, this was not reflected in an increase in the number of students that did the skin self-exam, which indicates the need for new approaches in teaching.
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