Teaching NeuroImages: Stroke with Nondecussating Corticospinal Tracts Causing Ipsilateral Weakness: Straight Forward

Abstract

A 43-year-old man presented with left carotid dissection. Examination showed left-sided Horner, left facial weakness, and left pronator drift. MRI brain showed a small left frontal infarct (figure 1), with no other areas of infarction and nondecussating corticospinal tracts on diffusion tensor imaging (figure 2).