“…Suggested causes include trauma, injury, inflammation, or compression at a peripheral nerve or radicular level 7,8 . Rarely patients with ON secondary to cervical cord lesions, such as an upper cervical cord cavernous angioma, neurosyphilis, and myelitis have been reported 7–10 . In the case presented, the patient's occipital headache would fit the current International Headache Society's criteria for ON, 6 although effect of anesthetic blockade on the pain was unknown.…”