Furthermore, there are dissimilarities as to anatomic site of melanomas in both sexes. Because of its importance for prognosis, it is essential to know tumour’s level of invasion [8].

Since treatment of melanomas relies on primary prevention and on earlier diagnosis of thinner lesions more likely to be cured by surgery, to know incident cases in a population-based setting, making reference to a whole province and regardless of medical centres where tumours were diagnosed, is indeed a very interesting contribution to improve health care and planning [9].