Diffusion Tensor Tractography for Determining Injury to the Oculomotor Nerve in a Patient With Cerebral Infarct

A 39-year-old male patient, diagnosed with a cerebral infarct in the left midbrain, visited Yeungnam University Hospital and underwent conservative management. Brain magnetic resonance imaging performed at 1 week from onset showed a leukomalactic lesion in the left midbrain (Fig. 1A). Mild ptosis (3 mm) and mild limitation in the upward (20°) and medical (10°) gaze were observed. However, his left eye was not deviated, and did not show mydriasis