Cerebellar hemorrhage: unusual ventriculographic findings.

A case of a cerebellar (vermian) hematoma that communicated with the fourth ventricle as seen on air study is presented. Although vertebral angiography appears to be the first diagnostic procedure of choice, the angiographic study may not be definitive diagnostically because it may be difficult to distinguish fourth ventricular enlargement from a cystic hematoma cavity in communication with the fourth ventricle. An air study may then be required to differentiate between such diagnostic possibilities.

Syndrome of normal pressure hydrocephalus: possible relation to hypertensive and arteriosclerotic vasculopathy.

A patient with clinical features of idiopathic normal pressure hydrocephalus, who responded dramatically to shunting, was found a necropsy to have a severe hypertensive and arteriosclerotic vasculopathy with multiple lacunar infarcts. There was no pathological evidence of thickened leptomeninges, fibrosis of the arachnoid villi, or Alzheimer's disease. An abnormal absorption mechanism was demonstrated with cisternography and by an increase in the concentration of homovanillic acid in the cerebrospinal fluid. It is suggested that vascular changes may play an important role in the pathophysiology in some cases of normal pressure hydrocephalus.

Myelographic evidence for nerve root enlargement in a case of Charcot-Marie-Tooth disease.

The myelographic findings of enlarged nerve roots in a patient with Charcot-Marie-Tooth disease is found to be identical to those of Hypertrophic Interstitial Neuritis and Neurofibromatosis. The hypertrophy of the roots may represent a single response to different noxious stimuli. Clinical and laboratory differentiation are given for the diseases.