Incidence in Granada is similar to incidence in other Spanish cancer registries which have medium-low rates world-wide. However, there is a wide geographical variation in rates. Incidence in the countries with the highest rates (Australia for males and New Zealand for females) is 10 times greater than Granada�s incidence.

Incidence dissimilarities between areas within a country or between different countries, as well as temporary variations of rates, indicate the existence of a diverse array of risk factors in the studied populations and their exposure to these factors throughout the different stages of life [13].