[Epidemiology of cutaneous head and neck carcinomas]

Skin Cancer are the more frequent malignant tumors in the caucasian population, however significant and particular difference are present in World Cancer Registries incidence data. The analysis of the temporal trend, more than the geographical trend, is thicken by three characteristics: incidence, relation between diagnosis and treatment, register rate. The British Columbia Cancer Registry probably gives the more reliable valuation and shows an incidence doubled for these tumors during the period of five years considered, (1973-1987). These trends are equal in male and female and also in the two type of tumors for all sites. The analysis of the Cancer Registries includes Italy as a country with an intermediate risk, the relation between male and female and the correlation with the age are similar among the Cancer Registries as seen in the caucasian population. The analysis of the cut off rate (35-64 years) and cumulative risk (0-64 years, 0-74 years) shows the importance of the age of insorgence.