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Type C brachydactyly transmitted through four generations.

J Sanz1, S Gilgenkrantz

  • 1Hôpital Jeanne d'Arc, Service de Chirurgie D, Dom-Martin-Les-Toul, France.

Annales De Genetique
|January 1, 1988
PubMed
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This study details a rare genetic disorder, type C brachydactyly, observed across four family generations. The condition shows incomplete penetrance and presents with foot abnormalities in the primary patient.

Area of Science:

  • Human Genetics
  • Skeletal Dysplasias
  • Medical Genomics

Background:

  • Brachydactyly encompasses a group of congenital limb malformations characterized by abnormally short digits.
  • Type C brachydactyly is a rare subtype, often associated with specific genetic mutations affecting skeletal development.
  • Understanding the inheritance patterns and phenotypic variability of brachydactylies is crucial for genetic counseling and diagnosis.

Observation:

  • A family pedigree spanning four generations revealed the transmission of a brachydactyly phenotype.
  • The inheritance pattern exhibited incomplete penetrance, meaning not all individuals with the genetic predisposition displayed the condition.
  • The proposita, the initial individual studied, presented with notable abnormalities of the feet.

Findings:

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  • The reported case confirms the hereditary nature of type C brachydactyly within a large family.
  • Incomplete penetrance highlights the complex genetic and environmental interactions influencing phenotype expression.
  • Associated foot abnormalities represent a significant clinical manifestation of this brachydactyly subtype.

Implications:

  • This case contributes to the understanding of type C brachydactyly's genetic architecture and clinical spectrum.
  • Further research into the specific genetic factors causing incomplete penetrance in brachydactyly is warranted.
  • Accurate diagnosis and genetic counseling are essential for families affected by hereditary brachydactyly.