[Pneumoencephalographic appearance of cerebral ventricles in spontaneous tremor]

Three patients of different ages with evidence of essential tremor of familial origin are reported. Pneumoencephalography demonstrated in these cases presence of hydrocephalus. The size of the cerebral ventricles was assessed by means of the index of Schiermann and Evans. No correlation was observed between the degree of changes in the ventricular system and the duration of the disease. Abnormalities moencephalograms concerned only the Evans index.