Related Experiment Video
Updated: Jul 3, 2026
09:16
Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
Subtelomeric 6p deletion: clinical and array-CGH characterization in two patients
Danielle Martinet1, Isabel Filges, Nathalie Besuchet Schmutz
1Service of Medical Genetics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland. danielle.martinet@chuv.ch
American Journal of Medical Genetics. Part A
|July 17, 2008
Summary
Two patients presented with de novo subtelomeric terminal deletion of chromosome 6p, revealing complex rearrangements. These cases highlight the importance of advanced genomic analysis for accurate diagnosis and understanding genotype-phenotype correlations in 6p deletion syndrome.
Area of Science:
- Genetics
- Human Genetics
- Clinical Genetics
Background:
- Subtelomeric terminal deletions of chromosome 6p can lead to significant developmental abnormalities.
- Accurate characterization of these deletions is crucial for understanding genotype-phenotype correlations.
Observation:
- Two patients with de novo subtelomeric terminal deletion of chromosome 6p were analyzed.
- Patient 1 exhibited severe developmental delay, deafness, and hypsarrhythmia.
- Patient 2 presented with characteristic facial features, embryotoxon, and moderate mental retardation.
Findings:
- High-resolution array comparative genomic hybridization (array-CGH) revealed complex rearrangements in both patients.
- Patient 1 had a 6pter-6p24.3 deletion with a contiguous 6p24.3-6p24.1 duplication.
- Patient 2 had a 6pter-6p25.1 deletion partially overlapping with Patient 1's deletion.
Implications:
- Simple chromosomal rearrangements can be more complex than initially detected by standard techniques.
- Advanced genomic analyses like array-CGH are essential for precise characterization of deletions.
- Understanding these complex rearrangements aids in predicting clinical outcomes and genetic counseling for 6p deletion syndrome.
Related Concept Videos
01:17Karyotyping
Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...
01:17Karyotyping
Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...