title: Large-segment superior oblique tendon expanders in the management of severe congenital Brown syndrome.
abstract: OBJECTIVE
  To report the effectiveness of large-segment superior oblique tendon expanders for severe congenital Brown syndrome.
  
  
  METHODS
  Medical records of 12 consecutive patients with severe congenital Brown syndrome were evaluated retrospectively. All patients had a hypotropia > 20 prism diopters in primary position. A superior oblique tendon lengthening procedure, using a 10- to 12-mm-long silicone band, was performed on each patient. Preoperative and postoperative extraocular motility patterns were analyzed, and the final results were graded as "excellent," "good," "fair," "poor, undercorrected" and "poor, overcorrected."
  
  
  RESULTS
  As of the last recorded follow-up examination (mean, 32 months), three patients had an excellent result, six had a good result, three had a fair result, and none had a poor result. All patients experienced an improvement in their severe Brown syndrome, with 100% showing a postoperative primary-position hypotropia < 8 prism diopters. Postoperative limitation of elevation in adduction was either -1 or -2 for all patients. No patient required further surgery, and no extrusions of the implants were noted.
  
  
  CONCLUSIONS
  The superior oblique tendon expander procedure appears to be an effective tool in the surgical treatment of severe Brown syndrome. The use of a large-segment (10- to 12-mm) band seems to be an appropriate choice when dealing with patients having primary-position hypotropia > 20 prism diopters.
authors.affiliation: Department of Medical Education, King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.
authors.forename: Abdulaziz H
authors.initials: AH
authors.lastname: Awad
authors.forename: Leonard G
authors.initials: LG
authors.lastname: Digout
authors.forename: Shahira
authors.initials: S
authors.lastname: Al-Turkmani
authors.forename: Arif O
authors.initials: AO
authors.lastname: Khan
authors.forename: Amna
authors.initials: A
authors.lastname: Fallata
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D005133:Eye Movements; D005260:Female; D006801:Humans; D008297:Male; D015835:Ocular Motility Disorders / Q000503:physiopathology / Q000601:surgery*; D009801:Oculomotor Muscles / Q000601:surgery*; D013508:Ophthalmologic Surgical Procedures / Q000379:methods*; D012189:Retrospective Studies; D012826:Silicone Elastomers / Q000627:therapeutic use*; D013577:Syndrome; D015626:Tissue Expansion / Q000379:methods; D015625:Tissue Expansion Devices; D016896:Treatment Outcome
chemical_list: D012826:Silicone Elastomers