[Cancer incidence by municipalities in Puerto Rico]

This study consist of the trends of those malignant tumours in Puerto Rico diagnosed 1960 to 1988 that we considered more related with some environmental factors. For this purpose 160,288 cancer cases analyzed included 16,286 of squamous and basal cell carcinomas of the skin diagnosed from 1950 up to 1975 only. We have darkened in the map and mentioned below in this summary those municipalities with incidence greater than Puerto Rico's average.