Artery of Percheron Occlusion: A Diagnostic Challenge

Artery of Percheron occlusion is a rare cause of ischaemic stroke characterized by bilateral thalamus infarction. Presentation is varied and non-specific, with the most frequent manifestations being altered level of consciousness, hypersomnolence or altered oculomotor movements. We describe the case of a 37-year-old man hospitalized for hypersomnia and hypomnesia with 3 days of evolution, who was diagnosed with a bilateral thalamus stroke due to artery of Percheron occlusion. LEARNING POINTS: Stroke is frequently encountered but can present a diagnostic challenge when presentation is non-specific or a lesion is not identified. Artery of Percheron stenosis has a varied and often non-specific presentation, which can lead to delayed diagnosis and treatment of these patients. It is important that doctors recognize this entity for timely diagnosis and treatment, and for the best prognosis.