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In a population of 100,000 persons there will be about 1600-2000 people with a disabling neurological disorder, of whom perhaps 600 will be so disabled as to require help every day simply to remain out of institutional care. Each general practitioner will have a load of about 30 neurologically disabled people, about 10 of whom will depend on families and community services for daily help. These figures describe the conditions seen most frequently in Neurology Out-patient clinics Incidences and prevalences of some of the rarer conditions: The combined prevalence of optic atrophy, ophthalmoplegia, cerebellar ataxia, Huntington’s chorea, muscular dystrophy, syringomyelia and cerebral tumour is about 100 per 100,000 – equivalent to the prevalence of Parkinson’s disease. Using an estimated incidence of 8 primary and 8 secondary tumours per 100,000 population per year, the average population of 100,000 will generate about 20 patients each year with a cerebral tumour requiring diagnosis and management. 20% of the eight patients with primary tumours are likely to have meningiomas and a further 4 will have a malignant tumour. There will be about 45 patients per 100,000 population with a cerebral tumour.
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