Primary cystic midline lesions of the brain in childhood.

It is known that primary cystic lesions of the midline of the brain in infants and children are not rare. In some cases these cystic lesions are considered to be the main cause in the production of hydrocephalus. The use of CT-scan tomography and CT scan metrizamide cisternography helped us to reveal some unsuspected cases of them. Our operative approach of these cystic lesions of the midline of the brain is described.