title: Bilateral homonymous superior quadrantanopia after traumatic attempts to remove a cockroach impacted in the external auditory canal.
abstract: Visual field defects typically caused by lesions in the optic nerve or optic chiasm may be caused indirectly by subdural haematomas. A 61-year-old man survived transtentorial herniation caused by subdural haematomas that resulted from shaking his head in an attempt to remove a cockroach impacted in his external auditory canal. Bilateral incomplete posterior cerebral artery infarction of both inferior tips of the occipital lobe resulted in bilateral superior quadrantanopia. There are no previous reports of tentorial herniation causing this permanent outcome.
authors.affiliation: Eye Genetics Research Group, Embryology, Children's Medical Research Institute, The Children's Hospital at Westmead, Sydney, NSW.
authors.forename: Wan Yi
authors.initials: WY
authors.lastname: Ng
authors.forename: Brian E
authors.initials: BE
authors.lastname: Chua
authors.forename: Todd A
authors.initials: TA
authors.lastname: Hardy
authors.forename: David
authors.initials: D
authors.lastname: Wechsler
authors.forename: Stephen W
authors.initials: SW
authors.lastname: Reddel
mesh_terms: D000818:Animals; D003058:Cockroaches; D004424:Ear Canal; D005547:Foreign Bodies / Q000150:complications* / Q000628:therapy*; D006408:Hematoma, Subdural / Q000150:complications* / Q000175:diagnosis / Q000628:therapy; D006423:Hemianopsia / Q000175:diagnosis / Q000209:etiology* / Q000628:therapy; D006801:Humans; D008297:Male; D008875:Middle Aged