title: Magnetic resonance imaging findings of the abducens nerves in type 1 Duane's retraction syndrome.
abstract: OBJECTIVE
  To investigate nervus abducens and extraocular mucles in patients with Type 1 Duane's retraction syndrome using high-definition magnetic resonance imaging.
  
  
  METHODS
  The study included 10 patients with Type I Duane's retraction syndrome who underwent magnetic resonance imaging (MRI) of the brain and orbits.
  
  
  RESULTS
  Overall, 10 cases were included in the study. There were seven women and three men. The mean age was 5.2 years (1-15 years). MRI of the abducens nerve was performed in all cases. Of the cases, the left eye was involved in eight cases, whereas the right eye was involved in two cases. There was no bilateral eye involvement. Among the 10 patients clinically diagnosed as Type 1 Duane's retraction syndrome, the abducens nerve could not be visualized in eight cases, whereas the nerve was hypoplastic in one case and bilateral abducens nerves were present in one case by MRI. The extraocular muscles were normal in all cases on T2 weighted coronal MRI of the orbits.
  
  
  CONCLUSIONS
  Absence of abducens nerve and normal extraocular muscles was detected in patients with Type 1 Duane's retraction syndrome at the affected side.
authors.affiliation: Medical Faculty, Mustafa Kemal University , Hatay , Turkey.
authors.forename: Esra Ayhan
authors.initials: EA
authors.lastname: Tuzcu
authors.forename: Hanifi
authors.initials: H
authors.lastname: Bayarogullari
authors.forename: Nesrin
authors.initials: N
authors.lastname: Atci
authors.forename: Fatmagul
authors.initials: F
authors.lastname: Basarslan
authors.forename: Mesut
authors.initials: M
authors.lastname: Coskun
authors.forename: Cahide
authors.initials: C
authors.lastname: Yilmaz
authors.forename: Nilufer
authors.initials: N
authors.lastname: Ilhan
authors.forename: Mutlu
authors.initials: M
authors.lastname: Daglioglu
mesh_terms: D000010:Abducens Nerve / Q000002:abnormalities*; D020434:Abducens Nerve Diseases / Q000175:diagnosis*; D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004370:Duane Retraction Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging; D008297:Male; D009801:Oculomotor Muscles / Q000473:pathology