Neuroradiology
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Descending tentorial herniation (DTH) can be diagnosed by computed tomography. Encroachment upon the lateral aspect of the suprasellar cistern is an early sign of impending tentorial herniation. ⋯ Aqueductal compression secondary to the herniation will cause increased intraventricular pressure with widening of those parts of the lateral ventricles that are not exposed to the compression by the mass; a characteristic finding is widening of the temporal horn on the side opposite the space-occupying lesion. Infarction in the territory of the posterior cerebral artery may complicate DTH.