From a high-quality population-based register of children with cancer, 455 cases diagnosed with central nervous system (CNS) tumours were analysed to examine patterns of occurrence and geographical distribution.
There was a significant increase of 1.8% (95% Cl 0.5-3.1, P<0.01) in average annual incidence for all CNS tumours, mainly accounted for by a 3.1% rise (95% Cl 0.1-6.1, P<0.05) in primitive neuroectodermal tumours (PNETs) over the 22-year period 1974-95.
These increases were not explained by an increase in the proportion of histologically verified tumours.
In the most recent time period (1986-95), astrocytomas occurred more commonly than previously in 0 to 4-year olds.
Geographical differences in incidence were evident at a large scale, between counties, for all tumours and astrocytomas, with lower rates in the most urbanized areas.
At the level of census district and electoral wards, no association between incidence of CNS tumours and socioeconomic group, person-based population density or ethnicity was observed using Poisson regression modelling.
Based on small-scale census geography, the patterns of distribution of CNS tumours do not suggest strong associations with geographical determinants of risk.
This study finds a rising incidence of all CNS tumours and particularly primitive neuroectodermal tumours and shows that astrocytomas appear to be occurring at a younger age, most probably because of improved diagnosis with non-invasive technology.
Mots-clés Pascal : Tumeur maligne, Intracrânien, Epidémiologie, Répartition géographique, Type histologique, Histopathologie, Registre, Royaume Uni, Europe, Enfant, Homme, Système nerveux pathologie, Système nerveux central pathologie, Encéphale pathologie
Mots-clés Pascal anglais : Malignant tumor, Intracranial, Epidemiology, Geographic distribution, Histological type, Histopathology, Register, United Kingdom, Europe, Child, Human, Nervous system diseases, Central nervous system disease, Cerebral disorder
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0451821
Code Inist : 002B17E. Création : 25/01/1999.