Opalski Syndrome: Atypical Presentation of Lateral Medullary Syndrome.

Lateral medullary syndrome (LMS) (Wallenberg syndrome) is a relatively uncommon stroke with classic presentation of crossed spinothalamic sensory deficit, same-side ataxia, and other findings. Hemiparesis is rare with LMS, and when associated, is termed Opalski syndrome. The author presents rarity in this less common posterior circulation stroke.