Anisocoria without extraocular muscle impairment due to moderate traumatic brain injury with midbrain contusion: a case report.

Background: New-onset anisocoria is an important clinical clue to life-threatening intracranial injury. Anisocoria alone without impairment of extraocular muscles is a rare presentation of moderate traumatic brain injury (TBI).

Case Presentation: A 79-year-old woman was transported to hospital soon after falling off a bicycle.