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Isolated fetal bilateral radial ray reduction associated with valproic acid usage
1Service de Gynécologie-Obstétrique II, Hôpital de Hautepierre, Université-Hôpital de Strasbourg, France.
Fetal Diagnosis and Therapy
|May 1, 1994
Summary
Valproic acid exposure in pregnancy may cause isolated bilateral radial ray reduction in fetuses. This finding highlights the importance of examining fetal extremities during ultrasound, especially after maternal valproic acid use.
Area of Science:
- Prenatal diagnosis
- Teratology
- Medical imaging
Background:
- Valproic acid is a commonly prescribed antiepileptic drug.
- In utero exposure to valproic acid is associated with various congenital anomalies.
- Radial ray abnormalities involve the bones of the forearm and hand.
Observation:
- The authors report the first documented case of isolated bilateral radial ray reduction in a fetus exposed to valproic acid.
- The diagnosis was established via ultrasound examination during the second trimester of pregnancy.
- This specific defect involved both upper extremities, affecting the radial bones and thumbs.
Findings:
- The presented case suggests a potential association between in utero valproic acid exposure and isolated bilateral radial ray reduction.
- Ultrasound is a crucial tool for prenatal diagnosis of skeletal abnormalities, including limb defects.
- The isolated nature of the defect in this case differentiates it from more complex syndromes sometimes associated with valproic acid.
Implications:
- Sonographers should meticulously examine fetal extremities during prenatal ultrasounds, particularly in cases of maternal valproic acid use.
- Increased awareness of this association may lead to earlier diagnosis and improved counseling for expectant mothers.
- Further research is warranted to confirm the teratogenic potential of valproic acid concerning isolated radial ray reduction and to understand the underlying mechanisms.