Jae Hyoung Kim1, Jeong-Min Hwang. 1. Department of Radiology, Seoul National University College of Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.
Abstract
OBJECTIVE: To determine whether the abducens nerve is present in patients with type 2 Duane's retraction syndrome (DRS). DESIGN: Retrospective, observational case series. PARTICIPANTS: 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. MAIN OUTCOME MEASURES: 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.
OBJECTIVE: To determine whether the abducens nerve is present in patients with type 2 Duane's retraction syndrome (DRS). DESIGN: Retrospective, observational case series. PARTICIPANTS: 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. MAIN OUTCOME MEASURES: 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.