A healthy, asymptomatic woman was referred after incidental discovery of a right superior incongruous hemianopia. Magnetic resonance imaging disclosed a schizencephalic cleft passing through Meyer's loop of the left optic radiation. The lesion may have resulted from a focal vascular accident or disruption of cortical neurogenesis during gestation.
Keywords: Col4A12 mutation; quadrantanopia; transmantle cleft; visual cortex.
© 2020 Taylor & Francis Group, LLC.