title: Recurrent Alternate-Sided Homonymous Hemianopia Due to Mitochondrial Encephalomyopathy with Lactic Acidosis and Stroke-Like Episodes (MELAS): A Case Report.
abstract: Mitochondrial encephalomyopathy with lactic acidosis and stroke-like episodes (MELAS) can rarely cause alternate-sided homonymous hemianopia due to stroke-like episodes involving the occipital lobes, as reported in three previously published cases. The authors report an interesting case of a 16-year-old presenting with myoclonic epilepsy due to MELAS with the rare ND3 mitochondrial mutation T10191C, with recurrent alternate-sided homonymous hemianopia. Visual field and corresponding magnetic resonance imaging (MRI) findings are presented. To the authors' knowledge, this is the first report of recurrent alternate-sided homonymous hemianopia in MELAS with documented visual field and MRI findings with resolution between each episode.
authors.affiliation: Division of Neurology, University of Toronto , Toronto, Ontario, Canada.
authors.forename: Kristen M
authors.initials: KM
authors.lastname: Krysko
authors.affiliation: Division of Neurology, University of Toronto, Toronto, Ontario, Canada; Department of Ophthalmology and Visual Sciences, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
authors.forename: Arun N E
authors.initials: AN
authors.lastname: Sundaram
keywords: Case report; MELAS; mitochondrial encephalomyopathy with lactic acidosis and stroke-like episodes; recurrent alternate-sided homonymous hemianopia