Conclusion
The combination of consciousness disorders, oculomotor impairment and hemiplegia should lead to the suspicion of brain stem damage and to emergency imaging, in particular MRI, which is the gold standard. If the latter is not available, a brain CT associated with CT angiogram of supra-aortic trunks can be used for investigation. If the imaging reveals lesions in the thalami, an infarction of Percheron’s artery should be considered. Although Weber’s syndrome associated with Percheron’s artery infarction is rare, the management is no different from other types of stroke and requires the same etiological approach. However, follow-up is important in order to determine the evolution, which is variable depending on the patient.
Table 1: Anatomical variations in the vascularity of the thalamus