title: Isolated trochlear nerve palsy with midbrain hemorrhage.
abstract: Midbrain hemorrhage causing isolated fourth nerve palsy is extremely rare. Idiopathic, traumatic and congenital abnormalities are the most common causes of fourth nerve palsy. We report acute isolated fourth nerve palsy in an 18-year-old lady due to a midbrain hemorrhage probably due to a midbrain cavernoma. The case highlights the need for neuroimaging in selected cases of isolated trochlear nerve palsy.
authors.affiliation: Department of Neuroophthalmology and Department of Neuropathology, Narayana Netaralaya, Bangalore, India.
authors.forename: S
authors.initials: S
authors.lastname: Raghavendra
authors.forename: K
authors.initials: K
authors.lastname: Vasudha
authors.forename: S Ravi
authors.initials: SR
authors.lastname: Shankar
mesh_terms: D000293:Adolescent; D002543:Cerebral Hemorrhage / Q000150:complications* / Q000175:diagnosis; D003937:Diagnosis, Differential; D004172:Diplopia / Q000175:diagnosis / Q000209:etiology*; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D008636:Mesencephalon; D020432:Trochlear Nerve Diseases / Q000150:complications* / Q000175:diagnosis; D014792:Visual Acuity