Cancer of the brain and other CNS had a strong geographical pattern which was similar for both sexes, though slightly less pronounced for men (Maps 18.1-18.3).
The maps of relative risk showed a gradient across the whole island, with the highest relative risk in the south-west, decreasing uniformly to the area of lowest risk in the north-east. The risk in urban areas was similar to that in the surrounding countryside.
Map 18.1 Brain and other central nervous system cancer, smoothed relative risks: both sexes
![](/sites/ncri/files/atlas/2007/image153.jpg)
Map 18.2 Brain and other central nervous system cancer, smoothed relative risks: males
![](/sites/ncri/files/atlas/2007/image154.jpg)
Map 18.3 Brain and other central nervous system cancer, smoothed relative risks: females
![](/sites/ncri/files/atlas/2007/image155.jpg)