['This study investigates the effect of leukoaraiosis on patients presenting with cognitive impairment after lacunar stroke.', 'Fourty-six patients with cognitive impairment and newly discovered lacunar stroke detected by brain magnetic resonance imaging underwent neuropsychological testing.', 'Patients with both lacunar infarct and leukoaraiosis performed less well on cognitive measures, compared to those with lacunar infarcts alone. Additionally, leukoaraiosis severity inversely correlated with cognitive performance.'] Does cognitive performance after lacunar stroke correlate with leukoaraiosis severity?