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Neural tube defect and amniotic band sequence
1Servei d'anatomia patologica, Hospital Sant Joan de Deu, Barcelona, Spain.
Genetic Counseling (Geneva, Switzerland)
|January 1, 1993
Summary
This study reports a rare case of severe fetal anomalies including anencephaly and limb defects, likely caused by amniotic adhesion syndrome and cephalic pole induction failure. Vascular disruption is proposed as a key pathogenic mechanism.
Area of Science:
- Developmental Biology
- Teratology
- Clinical Genetics
Background:
- Fetal anomalies present significant diagnostic and management challenges.
- Understanding the pathogenesis of complex congenital defects is crucial for genetic counseling and future research.
Observation:
- A 28-year-old pregnant woman at 18 weeks' gestation presented with anencephaly diagnosed via ultrasound.
- Post-abortion examination revealed severe fetal malformations: anophthalmia, absent cranial vault and nasal structures, limb reduction due to amniotic adhesions, and abdominal wall defects.
Findings:
- The case was diagnosed as amniotic adhesion syndrome and cephalic pole induction failure.
- Pathogenesis is attributed to vascular disruption leading to secondary reduction of paraaxial mesodermal cells, explaining the observed anomalies.
Implications:
- This case highlights the complex interplay of factors contributing to severe congenital malformations.
- Further research into vascular disruption and mesodermal development is warranted.
- Accurate diagnosis and understanding of pathogenesis are vital for prenatal counseling.