Introduction:
The artery of Percheron (AP) is an anatomical variant of the arteries of
the posterior circulation of the brain. Occlusion of this artery will
result in bilateral paramedian thalamic infarction with or without
midbrain involvement (1) . The clinical manifestations of ischemic
stroke in this area can be summarised as a triad: altered consciousness,
paralysis of verticality of gaze and memory disorders (2). They are
rarely associated with pyramidal signs or cranial nerve damage and the
brain scan is usually normal (3). This often leads to misdiagnosis in
our low-income countries where MRI (Magnetic Resonance Imaging) is still
not widely available. We report a case of Weber’s syndrome secondary to
an occlusion of Percheron’s artery.