Sammanfattning
Meningioma is the most common extra-axial, intracranial tumour. The incidence is 5/100,000 persons per year with a female:male ratio of 2:1. Only two predisposing factors have been identified: neurofibromatosis type 2 and ionising radiation. It has been suggested, that hormones, especially female, may have an impact on development. The results from studies on this matter have been inconclusive, and there is a need for further and broader research in the field of meningioma development.