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Sirenomelia.

Antima Banerjee1, M M A Faridi, Tushar K Banerjee

  • 1Department of Pediatrics, University College of Medical Sciences, New Delhi.

Indian Journal of Pediatrics
|August 28, 2003
PubMed
Summary
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Sirenomelia, a rare congenital anomaly, presents unique challenges. Early antenatal diagnosis of sirenomelia, linked to severe oligohydramnios, is crucial for managing affected pregnancies.

Area of Science:

  • Medical Genetics
  • Developmental Biology
  • Obstetrics

Background:

  • Sirenomelia is a rare congenital anomaly with an incidence of 1.5-4.2 per 100,000 births.
  • Its pathogenesis is complex, with proposed mechanisms including vascular steal phenomenon, posterior axial mesodermal defects, or teratogenic influences.

Observation:

  • Two cases of sirenomelia are presented, highlighting associated upper limb anomalies and vertebral defects.
  • One case also exhibited complete absence of certain lower limb bones.
  • Both cases demonstrated internal organ abnormalities, a single umbilical artery, and severe oligohydramnios.

Findings:

  • The study details two cases of sirenomelia with significant skeletal and internal organ malformations.
  • Key associated findings include upper limb anomalies, vertebral defects, single umbilical artery, and severe oligohydramnios.

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Implications:

  • Sirenomelia should be suspected antenatally in cases of severe oligohydramnios and intrauterine growth retardation.
  • Early diagnosis is essential for appropriate pregnancy management and potential interventions.
  • Understanding the diverse presentations aids in risk assessment and counseling for affected families.