Aims and background. This report provides data and statistics for cancer mortality in Italy in 2003, updating previous work on the issue. Methods. Cancer death certification numbers by cause and estimates of the resident population in 2003, stratified by sex and quinquennium of age, were obtained from the World Health Organization database. In 2003, cause of death encoding was changed from the 9(th) to the 10(th) Revision of the International Classification of Diseases (ICD). All cancers and groups of cancers, classified according to the 10th revision of the ICD, were grouped into 30 categories, besides other and unspecified sites. Mortality rates were age-standardized on the world standard population in five-year age groups up to 80-84 ye...