title: Increasing incidence of primary central nervous system tumors in the elderly: real increase or improved detection?
authors.forename: A
authors.initials: A
authors.lastname: Helseth
mesh_terms: D000368:Aged; D016543:Central Nervous System Neoplasms / Q000175:diagnosis* / Q000453:epidemiology*; D006801:Humans; D015994:Incidence; D009664:Norway / Q000453:epidemiology