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Risk factors in limb reduction defects.

C Stoll1, Y Alembik, B Dott

  • 1Institut de Puériculture, Centre Hospital-Universitaire, Strasbourg, France.

Paediatric and Perinatal Epidemiology
|July 1, 1992
PubMed
Summary
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Consanguinity and a family history of malformations are linked to limb reduction defects (LRD) in children. This study investigated risk factors for LRD, finding a higher incidence in relatives of affected infants.

Area of Science:

  • Medical Genetics
  • Pediatric Epidemiology
  • Congenital Malformations

Background:

  • Limb reduction defects (LRD) are congenital anomalies with varying prevalence and potential risk factors.
  • Understanding these factors is crucial for early identification and intervention strategies.

Purpose of the Study:

  • To investigate the prevalence and risk factors associated with limb reduction defects (LRD) in a defined population.
  • To analyze associated anomalies, pregnancy complications, and familial patterns in children with LRD.

Main Methods:

  • A case-control study was conducted on 123 children with LRD from 118,265 births (1979-1987).
  • LRD were classified using the EUROCAT guide; associated anomalies and pregnancy complications were recorded.
  • Parental characteristics and familial incidence of malformations were compared between cases and controls.

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Main Results:

  • The prevalence of LRD was 1.04 per thousand births, with 82.9% liveborn.
  • Associated anomalies included cardiac, digestive, and renal defects. Pregnancies were complicated by oligohydramnios, polyhydramnios, and threatened abortion.
  • Consanguineous marriages (9.7%) and a high incidence of LRD in first-degree relatives were observed (P < 0.01).

Conclusions:

  • Consanguinity and a family history of malformations are significant risk factors for limb reduction defects.
  • Genetic predisposition and potential environmental factors warrant further investigation in LRD etiology.
  • Early identification of familial risk can aid in genetic counseling and management of congenital anomalies.