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[Partial trisomy 11 revealed by labeling technics]

J Rullier, F Bajolle, A M Picard

Archives Francaises De Pediatrie

|August 1, 1978

Summary

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A normal karyotype in 1968 did not detect a chromosome 11 abnormality. A repeat test using advanced techniques revealed a partial duplication of chromosome 11, highlighting the importance of retesting.

Area of Science:

Genetics
Cytogenetics
Medical Diagnostics

Background:

A girl presented with multiple congenital malformations.
Initial genetic investigation was performed in 1968 using standard karyotyping.
The standard karyotype analysis in 1968 yielded normal results.

Observation:

A follow-up cytogenetic analysis was conducted seven years after the initial test.
Advanced chromosome labeling techniques were employed in the second investigation.
The patient continued to exhibit clinical signs suggestive of a genetic disorder.

Findings:

The repeat karyotype analysis revealed a partial duplication of the short arm of chromosome 11.
The advanced labeling techniques were crucial in identifying the chromosomal abnormality.

Related Experiment Videos

The initial standard karyotype performed before the advent of modern techniques missed this specific anomaly.

Implications:

This case underscores the diagnostic value of repeat karyotyping in cases with persistent clinical suspicion.
The evolution of cytogenetic techniques significantly impacts the detection of chromosomal abnormalities.
Re-evaluation with improved methods is essential for accurate genetic diagnosis, especially in complex malformation syndromes.