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Related Experiment Videos

Large duplication 4q25-q34 with mild clinical effect.

Hatem Elghezal1, Halima Sennana Sendi, Kamel Monastiri

  • 1Service de Cytogénétique et de Biologie de la Reproduction, Hôpital Farhat Hached, Sousse, Tunisia. hatem_elghezal@yahoo.fr <hatem_elghezal@yahoo.fr>

Annales De Genetique
|December 8, 2004
PubMed
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This study details a rare genetic condition, partial trisomy 4q, in a young boy. The findings link specific chromosome 4 regions to distinct developmental and physical characteristics.

Area of Science:

  • Genetics
  • Human Cytogenetics
  • Developmental Biology

Background:

  • Genetic duplications can lead to developmental abnormalities.
  • Partial trisomy 4q is a rare chromosomal disorder.
  • Understanding genotype-phenotype correlations is crucial for genetic diagnostics.

Observation:

  • A 5-year-old boy presented with dysmorphic features and mild intellectual disability, specifically delayed language.
  • Cytogenetic analysis revealed a de novo direct tandem duplication in chromosome 4q (dup(4)(q25q34)).
  • This resulted in a pure partial trisomy 4q.

Findings:

  • The specific duplicated region 4q31-q33 appears associated with characteristic dysmorphic features.
  • The distal band 4q35 is potentially linked to microcephaly and severe growth and intellectual retardation.

Related Experiment Videos

  • This case refines the understanding of the 4q duplication syndrome.

    • Implications:

    • Accurate diagnosis of trisomy 4q aids in predicting developmental outcomes.
    • Further research into specific chromosomal regions can improve genetic counseling.
    • This case contributes to the clinical understanding of rare chromosomal abnormalities.