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Related Experiment Videos

Partial duplication of 17 long arm.

E Lenzini1, A Leszl, L Artifoni

  • 1Dipartimento di Pediatria, Università di Padova, Italy.

Annales De Genetique
|January 1, 1988
PubMed
Summary

Partial duplication of chromosome 17q, resulting from parental translocations, is linked to severe developmental issues. This study details three new cases, comparing their phenotypes to existing literature.

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Area of Science:

  • Genetics
  • Developmental Biology
  • Clinical Medicine

Background:

  • Reciprocal translocations involving chromosomes 11 and 17 can lead to partial duplications of chromosome 17q.
  • These chromosomal abnormalities are associated with a spectrum of congenital anomalies and developmental deficits.

Observation:

  • Three subjects from two unrelated families presented with partial 17q duplication due to different paternal and maternal translocation breakpoints.
  • Clinical manifestations included severe psychomotor and mental retardation, craniofacial dysmorphies (micrognathia, bulbous nose), short neck, skeletal anomalies, and central nervous system defects.

Findings:

  • The described cases align with the known phenotypic spectrum of partial 17q duplication.
  • Comparison with twelve previously reported cases highlights consistent features across different translocation origins.

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Implications:

  • This research contributes to understanding the genotype-phenotype correlation in partial 17q duplication syndromes.
  • Accurate cytogenetic prenatal diagnosis is crucial for genetic counseling and management of affected families.