title: Isolated upgaze palsy in a patient with vertebrobasilar artery dolichoectasia; a case report.
abstract: OBJECTIVE
  To report isolated upgaze palsy in a patient with a dolichoectatic vertebrobasilar artery.
  
  
  METHODS
  We report a 48-year-old man who showed upgaze palsy and convergence insufficiency. The left vertebral artery and basilar artery were shown to be greatly expanded, elongated and tortuous in cranial magnetic resonance imaging (MRI). The vertebrobasilar artery runs along the sulcus basilaris superior to the pontomesencephalic junction.
  
  
  CONCLUSIONS
  A dolichoectatic basilar artery may result in compression of midbrain structures related to vertical gaze.
authors: Gaziosmanpasa University Faculty of Medicine, Department of Ophthalmology, Tokat, Turkey.
authors: Huseyin
authors: H
authors: Ortak
authors: Gaziosmanpasa University Faculty of Medicine, Department of Anatomy, Tokat, Turkey.
authors: Ufuk
authors: U
authors: Tas
authors: Gaziosmanpasa University Faculty of Medicine, Department of Neurology, Tokat, Turkey.
authors: Durdane Bekar
authors: DB
authors: Aksoy
authors: Gaziosmanpasa University Faculty of Medicine, Department of Neurosurgery, Tokat, Turkey.
authors: Erdoğan
authors: E
authors: Ayan
keywords: Dolichoectasia; Magnetic Resonance Imaging; Midbrain; Vertical Gaze Palsy