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Limb body wall complex: I. Pathogenesis.

M I Van Allen1, C Curry, L Gallagher

  • 1Department of Medicine, University of Washington, Seattle 98105.

American Journal of Medical Genetics
|November 1, 1987
PubMed
Summary
This summary is machine-generated.

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Limb body wall complex (LBW complex) in fetuses is often linked to vascular disruption during early gestation. This disruption causes tissue loss and secondary malformations, with extraembryonic coelom persistence contributing to amniotic adhesions.

Area of Science:

  • Developmental Biology
  • Medical Genetics
  • Fetal Pathology

Background:

  • Limb body wall complex (LBW complex) is a severe congenital anomaly.
  • Previous studies suggest various etiologies, but a unifying theory remains elusive.

Purpose of the Study:

  • To investigate the etiology and associated anomalies in fetuses diagnosed with LBW complex.
  • To explore the role of vascular disruption and extraembryonic coelom persistence in LBW complex development.

Main Methods:

  • Retrospective analysis of 25 fetuses diagnosed with LBW complex.
  • Diagnostic criteria included exencephaly/encephalocele with facial clefts, thoraco-/abdominoschisis, and limb defects.
  • Examination of placental findings, including extraembryonic coelom and amniotic margin status.

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Main Results:

  • Ninety-five percent of fetuses had associated internal structural defects, 72% attributed to vascular disruption.
  • No consistent correlation was found between the location of body wall defects and limb, internal, or cranial defects.
  • Eighty-five percent showed evidence of extraembryonic coelom persistence, with 40% exhibiting amniotic tags and adhesions.

Conclusions:

  • Vascular disruption during 4-6 weeks of gestation is a likely etiology for LBW complex.
  • Persistence of the extraembryonic coelom may contribute to amniotic adhesions and related malformations.
  • LBW complex involves tissue disruption, loss, and secondary malformations, supporting a vascular etiology.