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MR Imaging of Familial Superior Oblique Hypoplasia
  1. Jae Hyoung Kim,
  2. Jeong-Min Hwang*
  1. Seoul National University College of Medicine, Seoul National University Bundang Hospital, Korea, Republic of
  1. Correspondence to: Jeong-Min Hwang, Department of Ophthalmology, College of Medicine Seoul National University, Seoul, Korea, Seoul National University Bundang Hospital, 300, Kumi-dong, Bundang-ku, Sungnam, 463-707, Korea, Republic of; hjm{at}snu.ac.kr

Abstract

Background: Congenital superior oblique palsy is usually associated with a structural abnormality of the superior oblique tendon. There have been many reports of familial congenital superior oblique palsy. However, there has been no magnetic resonance imaging (MRI) documentation of familial superior oblique hypoplasia.

Methods: Ophthalmologic examination and orbital MRI were performed in three patients in a pedigree with familial superior oblique palsy. They showed typical signs of superior oblique palsy, including superior oblique underaction and over-elevation in adduction on the affected side, torticollis in the early part of life, facial asymmetry, and positive head tilt testing.

Results: Moderate to severe superior oblique hypoplasia was identified in all three affected family members.

Conclusion: Superior oblique hypoplasia confirmed with MRI was useful for clarifying the etiology of familial superior oblique palsy.

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