Abducens nerve is present in patients with type 2 Duane's retraction syndrome.
OBJECTIVE
To determine whether the abducens nerve is present in patients with type 2 Duane's retraction syndrome (DRS).


METHODS
Retrospective, observational case series.


METHODS
Twelve consecutive patients diagnosed with type 2 DRS.


METHODS
A retrospective review of medical records of ophthalmologic examination and thin-sectioned magnetic resonance imaging (MRI) at the brainstem level and the orbit was performed on 12 patients who showed the typical signs of type 2 DRS, including adduction deficit; globe retraction; narrowing of fissure on adduction; and upshoot, downshoot, or both.


METHODS
Presence of the abducens nerve and any other extraocular muscle abnormalities discovered by MRI scan.


RESULTS
Magnetic resonance imaging revealed the presence of the abducens nerve in all the affected eyes (n = 13) of 12 patients with type 2 DRS.


CONCLUSIONS
The abducens nerve is present on the affected side in type 2 Duane's retraction syndrome.
Department of Radiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
Jae Hyoung
JH
Kim
Jeong-Min
JM
Hwang
D000010:Abducens Nerve / Q000473:pathology*; D020434:Abducens Nerve Diseases / Q000175:diagnosis*; D004370:Duane Retraction Syndrome / Q000175:diagnosis*; D005133:Eye Movements; D006801:Humans; D008279:Magnetic Resonance Imaging; D009801:Oculomotor Muscles / Q000473:pathology; D012189:Retrospective Studies