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Triphalangeal thumb and split foot in the same family
B Le Marec1, S Odent, C Treguier
1Service de Pédiatrie-Génétique Médicale, Hôpital Pontchaillou, Rennes.
Genetic Counseling (Geneva, Switzerland)
|January 1, 1990
Summary
This study highlights a family with triphalangeal thumb and nail hypoplasia, where one member also exhibits split feet. This case underscores the need for careful genetic counseling, even for seemingly minor congenital anomalies.
Area of Science:
- Medical Genetics
- Developmental Biology
- Clinical Medicine
Background:
- Triphalangeal thumb is a congenital anomaly affecting thumb development.
- Nail hypoplasia is a condition characterized by underdeveloped fingernails or toenails.
- Split foot malformation (ectrodactyly) is a rare limb defect.
Purpose of the Study:
- To report a family exhibiting a spectrum of limb malformations including triphalangeal thumb, nail hypoplasia, and split feet.
- To emphasize the importance of thorough genetic evaluation in cases of seemingly isolated congenital anomalies.
- To inform genetic counseling practices for families with hereditary limb anomalies.
Main Methods:
- Clinical observation and documentation of affected family members.
- Review of medical history and physical examinations.
- Pedigree analysis to assess inheritance patterns.
Main Results:
- A family presented with triphalangeal thumb and nail hypoplasia.
- One family member additionally displayed split feet (ectrodactyly).
- The findings suggest a potential genetic link or variable expressivity of a condition causing these anomalies.
Conclusions:
- The co-occurrence of triphalangeal thumb, nail hypoplasia, and split feet in a family necessitates careful genetic counseling.
- Genetic counseling should consider the potential for broader phenotypic expression even in cases of presumed minor anomalies.
- Further research may be needed to elucidate the genetic basis of this specific combination of malformations.