title: Late detection of supraclinoid carotid artery aneurysm after traumatic subarachnoid hemorrhage and occlusion of the ipsilateral cervical internal carotid artery.
abstract: OBJECTIVE
  We report the first case of traumatic aneurysm of the supraclinoid internal carotid artery (ICA), which we speculate may have developed or grown after traumatic occlusion of the ipsilateral cervical ICA.
  
  
  METHODS
  A 26-year-old man presented with severe traumatic subarachnoid hemorrhage (SAH) and occlusion of the right cervical ICA after a motor vehicle accident. Three-dimensional CT angiography on admission showed no aneurysm. However, cerebral angiography 3 weeks after the injury showed a large aneurysm of the right supraclinoid ICA. The aneurysm was trapped, and pathological examination showed that it was a traumatic aneurysm.
  
  
  CONCLUSIONS
  In this case we cannot be sure that the aneurysm was not present on admission. In view of the significant SAH, a lesson of this case may be to suspect such an aneurysm early on and perform early diagnostic cerebral angiography.
authors.affiliation: Department of Neurosurgery, Mie Prefectural General Medical Center, Mie, Japan. suzuki4@ztv.ne.jp
authors.forename: H
authors.initials: H
authors.lastname: Suzuki
authors.forename: M
authors.initials: M
authors.lastname: Muramatsu
authors.forename: T
authors.initials: T
authors.lastname: Shimizu
authors.forename: I
authors.initials: I
authors.lastname: Kusano
authors.forename: T
authors.initials: T
authors.lastname: Kojima
mesh_terms: D000063:Accidents, Traffic; D000328:Adult; D000783:Aneurysm / Q000175:diagnosis* / Q000209:etiology / Q000601:surgery; D015875:Anisocoria / Q000209:etiology; D001929:Brain Edema / Q000209:etiology / Q000601:surgery; D002340:Carotid Artery Diseases / Q000150:complications / Q000175:diagnosis*; D002533:Cerebral Angiography; D006801:Humans; D008297:Male; D010291:Paresis / Q000209:etiology; D020206:Subarachnoid Hemorrhage, Traumatic / Q000150:complications / Q000175:diagnosis* / Q000601:surgery; D014057:Tomography, X-Ray Computed