A syndrome caused by an infarct in the vertebral or posterior inferior cerebellar artery. It is characterized by sensory defects affecting the same side of the face as the infarct and the opposite side of the trunk as the infarct. Patients experience difficulty swallowing and/or speaking. The disease is MONDO_0006827 (lateral medullary syndrome). Also known as: Posterior inferior cerebellar artery syndrome, Wallenberg syndrome, Wallenberg's syndrome.