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Omphalocoele-exstrophy-imperforate anus-spinal defects complex in dizygotic twins
Frank Noack1, Friedhelm Sayk, Ulrich Gembruch
1Department of Pathology, Universitatsklinikum Schleswig-Holstein, Campus Lübeck, University of Lübeck, Lübeck, Germany. noack@patho-mu.luebeck.de
Fetal Diagnosis and Therapy
|August 23, 2005
Summary
The OEIS complex, a rare condition with multiple birth defects, was observed in a dizygotic twin pregnancy. Early ultrasound detection is crucial for diagnosis and management of this multisystem defect.
Area of Science:
- Medical Genetics
- Developmental Biology
- Maternal-Fetal Medicine
Background:
- The OEIS complex (omphalocele, exstrophy of the cloaca, imperforate anus, and spinal defects) is a rare congenital anomaly with an estimated incidence of 1 in 200,000–400,000 pregnancies.
- The exact etiology remains unclear, with proposed causes including defects in blastogenesis and homeobox gene mutations (e.g., HLXB9).
- A higher incidence in monozygotic twins suggests a potential genetic component.
Observation:
- This report details a unique case of the OEIS complex occurring in a dizygotic twin pregnancy.
- Prenatal diagnosis via ultrasound is challenging but feasible.
Findings:
- Sonographic identification of omphalocele alongside an open neural tube defect warrants a thorough search for other OEIS-associated anomalies.
- The occurrence in dizygotic twins presents a distinct scenario compared to the typically observed higher incidence in monozygotic twins.
Implications:
- Accurate prenatal diagnosis through ultrasound or at autopsy is vital for effective parental counseling and perinatal care.
- Understanding the genetic and developmental factors contributing to the OEIS complex is essential for improving diagnostic accuracy and management strategies.
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