Systematic ventriculographic studies in infants born with meningomyelocele and encephalocele. The incidence and development of hydrocephalus.

Increasing experience and the introduction of new techniques in the treatment of congenital hydrocephalus demand its earliest possible recognition and knowledge of its natural history. By far the commonest type of congenital hydrocephalus is the one associated with a meningomyelocele or encephalocele. The presence of hydrocephalus in such infants should be suspected at birth, simply because the association is so common.