Findings of segmental zoster paresis on MRI

Abstract

A 72-year-old man developed herpes zoster rash involving the left C3-5 dermatomes. The patient was receiving treatment for myasthenia gravis, which was very well controlled with oral prednisolone (25 mg). There was no muscle weakness or other complications on examination in the outpatient clinic. Ten days before the onset of rash, he noticed weakness of the left arm. On admission, the left arm weakness was limited to muscles controlled by the C5 myelomere. He had no clinical symptoms of myelitis, but the T2-weighted magnetic …