the surgical methods used , the reasons for re-operation , the time distribution of post-operative complications , the causes of death and the long term results are analysed and discussed for each of the four groups : tetraventricular communicating hydrocephalus , triventricular hydrocephalus , obstructive hydrocephalus with a ventriculo-cisternal block and post-meningocele or post-myelomeningocele hydrocephalus .
C0009451
communicating hydrocephalus
C0020255
hydrocephalus