title: Tendon laxity in superior oblique palsy.
abstract: BACKGROUND
  Some congenital superior oblique palsies are known to be due to anomalous or lax superior oblique tendons. This prospective study of 24 patients with a diagnosis of superior oblique palsy was performed to determine the prevalence and significance of anatomic tendon anomaly or laxity as diagnosed by traction testing of the superior oblique tendon.
  
  
  METHODS
  Traction testing was performed on 24 consecutive superior oblique palsy patients to determine the relative laxity of the tendons.
  
  
  RESULTS
  All 14 patients who were believed to have congenital palsy by history and clinical examination were found to have lax tendons. No patient with acquired unilateral palsy showed similar tendon laxity.
  
  
  CONCLUSIONS
  These findings have significant implications regarding the diagnosis and possible cause of congenital superior oblique palsy as well as implications for surgical management.
authors.affiliation: Department of Ophthalmology, Indiana University School of Medicine, Indianapolis 46202.
authors.forename: D A
authors.initials: DA
authors.lastname: Plager
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008875:Middle Aged; D009801:Oculomotor Muscles / Q000473:pathology*; D009886:Ophthalmoplegia / Q000151:congenital / Q000473:pathology* / Q000601:surgery; D015995:Prevalence; D011446:Prospective Studies; D012026:Reflex, Stretch; D013710:Tendons / Q000473:pathology*