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