Related Experiment Videos
Distal limb deficiency following chorionic villus sampling?
R Schloo1, P Miny, W Holzgreve
1Department of Human Genetics, Universitätsklinik Münster, Germany.
American Journal of Medical Genetics
|February 1, 1992
Summary
Chorionic villus sampling (CVS) in nearly 3000 pregnancies showed few distal limb deficiencies. Available evidence does not clearly link CVS procedures to an increased risk of these rare birth defects.
Area of Science:
- Medical Genetics
- Prenatal Diagnosis
- Teratology
Background:
- Chorionic villus sampling (CVS) is a common first-trimester prenatal diagnostic procedure.
- Concerns have been raised regarding a potential association between CVS and limb defects.
- Evaluating the risk of congenital anomalies following CVS is crucial for informed patient counseling.
Observation:
- A review of nearly 3000 pregnancies in the Münster CVS Program identified 4 infants with distal limb deficiencies.
- These included minor digital phalangeal anomalies and one case of Hanhart anomaly (hypoglossia hypodactylia).
- An additional 24 previously reported cases of limb defects after CVS were also analyzed.
Findings:
- The overall incidence of affected infants in this large cohort did not suggest a heightened risk.
- Analysis of larger reported series, excluding one outlier, also failed to provide unambiguous evidence linking CVS to distal limb deficiency.
- The data indicate that distal limb anomalies following CVS are rare.
Implications:
- The findings suggest that CVS is unlikely to be a significant teratogenic factor for distal limb development.
- This study provides reassurance for patients undergoing CVS regarding the risk of limb defects.
- Further large-scale studies may be warranted to definitively confirm the low risk, especially in light of previous conflicting reports.