title: Sudden visual loss and a chiasmal syndrome due to an intrachiasmatic vascular malformation.
abstract: A 48-year-old woman presented with a chief complaint of visual loss and bitemporal hemianopia. A similar episode of temporal visual field loss had occurred 34 months earlier and spontaneously resolved. Computerized tomography demonstrated a suprasellar mass. Angiography was normal. At surgery a venous angioma of the optic chiasm with a fresh hematoma was found and removed. Intrachiasmatic vascular malformation is an unusual finding which should be considered in the differential diagnosis in patients with a chiasmal syndrome.
mesh_terms: D003389:Cranial Nerve Diseases / Q000150:complications; D003390:Cranial Nerve Neoplasms / Q000150:complications* / Q000601:surgery; D005260:Female; D006391:Hemangioma / Q000150:complications* / Q000601:surgery; D006406:Hematoma / Q000150:complications* / Q000601:surgery; D006423:Hemianopsia / Q000209:etiology*; D006801:Humans; D008875:Middle Aged; D009897:Optic Chiasm / Q000000981:diagnostic imaging / Q000601:surgery; D014057:Tomography, X-Ray Computed; D014794:Visual Fields