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Variant euchromatic band within 16q12.1

R S Verma1, S M Kleyman, R A Conte

  • 1Division of Genetics, The Long Island College Hospital, SUNY Health Science Center at Brooklyn, NY 11201-5514, USA.

Clinical Genetics
|March 31, 1998
PubMed
Summary
This summary is machine-generated.

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An unusual chromosome 16 variant with an additional band on the long arm was identified in a mother and daughter. This familial genetic finding, confirmed by FISH, appears to have no clinical significance.

Area of Science:

  • Human genetics
  • Cytogenetics
  • Molecular biology

Background:

  • Chromosome 16 variants, specifically enlarged short arms with additional euchromatic bands, are typically considered benign genetic variations.
  • Understanding the spectrum of chromosomal abnormalities and their clinical relevance is crucial in genetic diagnostics.

Observation:

  • A rare variant of chromosome 16 was observed, characterized by an additional band (q12.1) on the long arm.
  • This specific chromosomal anomaly was present in both a mother and her daughter, indicating a familial inheritance pattern.

Findings:

  • Fluorescence In Situ Hybridization (FISH) analysis confirmed the origin of the additional band to be chromosome 16.
  • The familial occurrence of this chromosome 16 variant strongly suggests it is a benign constitutional abnormality with no associated pathogenicity.

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Implications:

  • This case expands the known variations of chromosome 16 and highlights the importance of family studies in interpreting chromosomal anomalies.
  • The findings reinforce that not all chromosomal variations, even unusual ones, necessarily lead to clinical symptoms or genetic disorders.
  • Further research into familial chromosomal variants can aid in establishing normative data for genetic interpretation.