Bilateral thalamic infarction secondary to artery of Percheron occlusion: A rare cause of acute coma

An occlusion of the artery Percheron (AOP) is a rare clinical condition that remains diagnostic challenge for physicians given its variable presentation. This infarction result an anatomical variant single vessel arising from posterior cerebral artery. Occlusion AOP results in levels alteration consciousness, vertical gaze palsy, and memory impairment. Unfortunately, due to this presentation these strokes are often missed. We report case 71 year-old-female who presented with sudden onset unresponsiveness was subsequently diagnosed bilateral thalamic midbrain involvement secondary occlusion. Delayed diagnosis can poor neurologic outcomes as demonstrated making it imperative bring further awareness syndrome.