Anomalous origin of right vertebral artery from right external carotid artery

A 50 years old male was admitted with sub-arachnoid haemorrhage. Angiographic examination revealed an abnormal origin of the right vertebral artery from the right external carotid artery. Multiple variations in the origin of right vertebral artery have been reported in literatures. Anomalous origin of the right vertebral artery from the right external carotid artery has not been reported earlier.