<prompt> All of the following are true regarding Temporal arteritis exceptAge 50 yearsUnilateral headacheDiagnosed by measuring high ESRComplicated by ischemic optic neuropathy  <response>: B Unilateral headache Giant cell arteritis or Cranial arteritis or Temporal arteritis Occurs almost exclusively in individuals 50 years The disease is characterized by the complex of fever, anemia, high ESR, and headaches in a patient over the age of 50 years. A well recognized dreaded complication of giant cell arteritis, particularly in untreated patients, is ischemic optic neuropathy, which may lead to serious visual symptoms, even sudden blindness in some patients. 