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Proximal phocomelia and radial ray aplasia in fetal valproic syndrome
A Verloes1, A Frikiche, C Gremillet
1Center for Human Genetics, C.H.U. Sart Tilman, Liège, Belgium.
Insights
Valproic acid exposure during pregnancy may cause severe birth defects, including fetal valproic syndrome and limb abnormalities. This case highlights the potential teratogenic effects of valproic acid in epilepsy treatment.
Area of Science:
- Teratology
- Developmental Toxicology
- Clinical Teratology
Background:
- Valproic acid is an anticonvulsant medication used to treat epilepsy.
- Exposure to certain medications during pregnancy can lead to birth defects.
- Post-traumatic epilepsy necessitates careful management during gestation.
Observation:
- A pregnant woman with post-traumatic epilepsy was treated with valproic acid (1000 mg/day).
- The child was born with multiple congenital anomalies.
- Observed defects included fetal valproic syndrome dysmorphism, bilateral radial ray aplasia, unilateral proximal phocomelia, kidney hypoplasia, and brain atrophy.
Findings:
- The observed congenital anomalies are consistent with known teratogenic effects of valproic acid.
- The specific combination of limb defects and organ malformations suggests a direct teratogenic impact.
- This case supports previous reports linking valproic acid exposure to radial defects.
Implications:
- Valproic acid use in pregnant women requires careful risk-benefit assessment.
- Alternative epilepsy treatments with lower teratogenic potential should be considered for women of childbearing age.
- Further research into the precise mechanisms of valproic acid teratogenicity is warranted.
Abstract:
We describe a child with multiple congenital anomalies born to a women treated with valproic acid (1000 mg/day) for post traumatic epilepsy. Defects included the typical dysmorphism of the "fetal valproic syndrome", bilateral radial ray aplasia, unilateral proximal phocomelia of the upper limb, kidney hypoplasia and brain atrophy. A direct teratogenic effect of valproic acid is suspected on an experimental basis, and validated by two previous reports of radial defects after valproic acid exposure.