Cerebellar infarction: a clinical and CT study.

Seven patients with computed tomographic (CT) evidence of cerebellar infarction were found during review of all CT records over a 5-year period. CT demonstrated decreased density in 2 distinct anatomic areas, corresponding to the distribution of the posterior inferior cerebellar artery and the superior cerebellar artery. Some patients also had hydrocephalus and fourth ventricular effacement and displacement. The location and extent of infarction do not relate directly to the clinical outcome. Rapid deterioration of the patient's sensorium is the best indication for surgical decompression.