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Trisomy 20p from maternal t(3;20) translocation.

N Archidiacono, D Tecilazich, G Tonini

Journal of Medical Genetics

|June 1, 1979

Summary

This summary is machine-generated.

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This study describes trisomy 20p, a genetic condition caused by a maternal translocation. Key features include distinct facial characteristics, developmental delays, and physical abnormalities.

Area of Science:

Genetics
Human Genetics
Clinical Genetics

Background:

Trisomy 20p is a rare chromosomal abnormality.
Maternal translocations can lead to unbalanced chromosomal rearrangements in offspring.
Accurate identification of chromosomal abnormalities is crucial for diagnosis and management.

Observation:

A case of trisomy 20p was identified in a proband.
The condition resulted from a maternal translocation, specifically t(3;20).
Cytogenetic banding techniques, including QM and BUdR, were employed for precise identification.

Findings:

The proband presented with a characteristic phenotype.
Observed features included a round face, oblique palpebral fissures, and strabismus.

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Associated abnormalities involved cardiac and vertebral defects, mild psychomotor retardation, poor coordination, and speech impediment.

Implications:

This case highlights the phenotypic spectrum of trisomy 20p.
Understanding the genetic basis (maternal translocation) aids in genetic counseling.
Early identification of these features can guide clinical management and supportive care.