title: Bilateral Adduction Palsy in a Patient with Myotonic Dystrophy Type 1.
abstract: Myotonic dystrophy type 1 (DM1) is caused by CTG repeat expansion in the DMPK gene in chromosome 19q13.3. External ophthalmoplegia is a rare manifestation in DM1. We report a DM1 patient confirmed by the presence of 650 CTG triplet expansions in the DMPK gene and had limitation of adduction gaze bilaterally. Brain MRI showed bilateral medial rectus muscles atrophy. Our patient provides additional evidence of ocular motor muscle involvement in DM1.
authors.affiliation: Department of Neurology, Jeju National University School of Medicine, Jeju 63241, Korea.
authors.forename: Hong-Jeon
authors.initials: HJ
authors.lastname: Kim
authors.affiliation: Department of Neurology, Jeju National University School of Medicine, Jeju 63241, Korea.
authors.forename: Jung-Hwan
authors.initials: JH
authors.lastname: Oh
authors.affiliation: Department of Neurology, Jeju National University School of Medicine, Jeju 63241, Korea.
authors.forename: Sa-Yoon
authors.initials: SY
authors.lastname: Kang
keywords: Atrophy; MRI; Myotonia; Myotonic dystrophy; Ophthalmoplegia