title: Misdiagnosis of a Patient with Internal Carotid Artery Fenestration: A Case Report and Literature Review.
abstract: BACKGROUND
  Internal carotid artery fenestration is a rare congenital cerebrovascular condition and can be misdiagnosed as carotid artery dissection.
  
  
  METHODS
  A patient was initially misdiagnosed with carotid artery dissection. This initial diagnosis was made using a carotid vascular computed angiography and magnetic resonance angiography. A digital subtraction angiography examination revealed a fenestration in the terminal C1 segment of the right internal carotid artery. Previous literature related to carotid artery fenestration was reviewed and analyzed.
  
  
  CONCLUSIONS
  Fenestration of the carotid artery combined with aneurysm at the external segment of the internal carotid artery or from the starting position of the carotid artery remains rare in elderly patients, can be misdiagnosed as artery dissection.
authors.affiliation: Department of Neurology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College, Yantai, Shandong Province, China. Electronic address: zgliang@hotmail.com.
authors.forename: Zhigang
authors.initials: Z
authors.lastname: Liang
authors.affiliation: Department of Neurology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College, Yantai, Shandong Province, China.
authors.forename: Chunming
authors.initials: C
authors.lastname: Xiu
authors.affiliation: Department of Neurology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College, Yantai, Shandong Province, China.
authors.forename: Zhuli
authors.initials: Z
authors.lastname: Liu
authors.affiliation: Department of Neurology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College, Yantai, Shandong Province, China.
authors.forename: Xuwen
authors.initials: X
authors.lastname: Sun
authors.affiliation: Department of Neurology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College, Yantai, Shandong Province, China.
authors.forename: Guoping
authors.initials: G
authors.lastname: Yu
authors.affiliation: Department of Neurology, Affiliated Yantai Yuhuangding Hospital of Qingdao University Medical College, Yantai, Shandong Province, China.
authors.forename: Manli
authors.initials: M
authors.lastname: Tao
authors.affiliation: Department of Neurology, Beijing Tiantan Hospital Affiliated to Capital Medicine University, Beijing, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
mesh_terms: D015901:Angiography, Digital Subtraction; D002343:Carotid Artery, Internal / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D020215:Carotid Artery, Internal, Dissection / Q000175:diagnosis*; D003951:Diagnostic Errors; D006801:Humans; D018810:Magnetic Resonance Angiography; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed