Weber's syndrome revealing a Percheron artery infarction: A case report.

Percheron's artery (PA) occlusion is an uncommon type of stroke involving paramedian thalamus and/or midbrain infarction. It accounts for 4%-18% of all thalamic infarcts and 0.1%-2% of all strokes. Its clinical manifestations are variable and its mode of presentation as Weber's syndrome is exceptional due to the unusual clinical presentation.