[A case of bilateral cervical internal carotid artery dissection following herpes zoster of the trigeminal nerve].

A 62 year-old man, who was taking prednisolone for nephrotic syndrome, was diagnosed with herpes zoster of the trigeminal nerve and treated with oral valacyclovir. One month later, he reported pain from the right side of the head and vomiting. MRI revealed an acute infarction in the right frontal lobe and dissection of the internal carotid artery of the right cervix.