title: Inferior altitudinal hemianopia associated with a tumor in the posterior fossa: report of a case.
abstract: Altitudinal hemianopias may be related to chiasmatic involvement. A case in which horizontal inferior hemianopia is associated with a tumor in the posterior fossa producing a triventricular hydrocephalus is described. The visual field defect is interpreted as a consequence of the pressure by a dilated third ventricle upon the chiasmatic area.
mesh_terms: D000328:Adult; D001932:Brain Neoplasms / Q000150:complications*; D003388:Cranial Fossa, Posterior; D005260:Female; D006423:Hemianopsia / Q000209:etiology*; D006801:Humans; D009408:Nerve Compression Syndromes / Q000209:etiology*; D009897:Optic Chiasm