Idiopathic normal pressure hydrocephalus is a neurological disorder with clinical diagnosis and imaging confirmation that benefits from a neurosurgical therapeutic solution in the vast majority of cases. Prevalence among the general population is not well defined at this time, but prevalence and incidence in developed countries is certainly steadily increasing due to increased life expectancy and evolution of diagnostic methods. Early diagnosis and appropriate treatment contribute to improving living conditions and can significantly reduce the cost of medical care for the elderly.