title: Congenital ectopia lentis. A Danish national survey.
abstract: OBJECTIVE
  To elucidate demographic and nosologic characteristics of congenital ectopia lentis (ECL) in Denmark.
  
  
  METHODS
  A register of affected persons was established based on information provided from medical records and files in a nation-wide retrospective study, the Danish ECL-study.
  
  
  RESULTS
  Three hundred and ninety-six cases (197 males, 199 females) with ECL were included in the study. By January 1st, 1993, the estimated prevalence rate of ECL was 6.4/100,000. The estimated average point prevalence rate at birth 1976-85 was 0.83/10,000 live born. Only in 69% of the cases (274/396) was a nosologic classification possible, based on preexisting information about familial occurrence, systemic and ocular findings: Marfan syndrome was found in 68.2% of these (187/274), ectopia lentis et pupillae in 21.2%, simple dominant ectopia lentis in 8.0%, homocystinuria in 1.1%, sulfite oxidase deficiency and Weill-Marchesani syndrome in 0.7% each. In the remaining 31% (122/396) a nosologic diagnosis could not be established.
  
  
  CONCLUSIONS
  The majority of affected persons have congenital ectopia lentis as a manifestation of a systemic disease. It is therefore essential to evaluate ECL patients systemically with a general physical examination, a metabolic screening, and an echocardiography as a minimum, in order to make a nosologic diagnosis and to prevent potentially life-threatening systemic complications.
authors.affiliation: The National Eye Clinic for the Visually Impaired, Hellerup, Denmark.
authors.forename: J
authors.initials: J
authors.lastname: Fuchs
authors.forename: T
authors.initials: T
authors.lastname: Rosenberg
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002648:Child; D002675:Child, Preschool; D003240:Connective Tissue Diseases / Q000150:complications / Q000453:epidemiology; D003718:Denmark / Q000453:epidemiology; D004479:Ectopia Lentis / Q000453:epidemiology* / Q000209:etiology / Q000235:genetics; D005260:Female; D006306:Health Surveys; D006712:Homocystinuria / Q000150:complications / Q000453:epidemiology; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D008382:Marfan Syndrome / Q000150:complications / Q000453:epidemiology; D008875:Middle Aged; D050862:Oxidoreductases Acting on Sulfur Group Donors / Q000172:deficiency; D015995:Prevalence; D012042:Registries; D012189:Retrospective Studies
chemical_list: D050862:Oxidoreductases Acting on Sulfur Group Donors