title: Variant origin of superior thyroid artery, occipital artery and ascending pharyngeal artery from a common trunk from the cervical segment of internal carotid artery.
abstract: We report a case of variant origin of superior thyroid artery (STA), occipital artery (OA) and ascending pharyngeal artery (APA) from the cervical segment of internal carotid artery (ICA) in a 63-year-old male patient, who presented with acute subarachnoid hemorrhage. Four-vessel angiography showed asymptomatic occlusion of ICA giving origin to the anomalous branches. There was common origin of the STA and the OA. The APA originated from the OA. We did not find any other description in the literature on variant origin of STA from the cervical segment of ICA in the presence of a well-developed external carotid artery.
authors.affiliation: Department of Neurosurgery, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum 695011, India.
authors.forename: Nilesh R
authors.initials: NR
authors.lastname: Aggarwal
authors.forename: Thamburaj
authors.initials: T
authors.lastname: Krishnamoorthy
authors.forename: Bobby
authors.initials: B
authors.lastname: Devasia
authors.forename: Girish
authors.initials: G
authors.lastname: Menon
authors.forename: Kesavadas
authors.initials: K
authors.lastname: Chandrasekhar
mesh_terms: D002342:Carotid Artery, External / Q000000981:diagnostic imaging; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000000981:diagnostic imaging; D002533:Cerebral Angiography / Q000379:methods; D006801:Humans; D008297:Male; D008875:Middle Aged; D009778:Occipital Lobe / Q000098:blood supply*; D010614:Pharynx / Q000098:blood supply*; D013345:Subarachnoid Hemorrhage / Q000150:complications; D013961:Thyroid Gland / Q000098:blood supply*