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[Phenotypic variation in partial trisomy 4q (author's transl)].

W Vogel, J W Siebers, J Gunkel

|June 19, 1975

Summary

This study reports on three patients with partial trisomy 4q, a chromosomal abnormality. Findings suggest no uniform phenotype associated with this specific genetic condition.

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Area of Science:

Genetics
Clinical Cytogenetics
Human Genetics

Background:

Partial trisomy 4q is a rare chromosomal aberration.
Understanding the clinical manifestations and genetic origins of trisomy 4q is crucial for diagnosis and genetic counseling.

Purpose of the Study:

To report clinical and cytogenetic data of three unrelated patients with partial trisomy 4q.
To compare these cases with existing literature to identify a potential uniform phenotype.

Main Methods:

Case report of three patients with detailed clinical and cytogenetic analysis.
Review and comparison of clinical data with seven previously reported cases from the literature.

Main Results:

Three non-related patients presented with partial trisomy 4q.
The chromosomal aberration arose from parental balanced translocations in two cases and a spontaneous inverted insertion in the third.
Comparison with literature cases did not reveal a consistent phenotype for partial trisomy 4q.

Conclusions:

Partial trisomy 4q can result from various chromosomal rearrangements, including parental translocations and spontaneous mutations.
The clinical presentation of partial trisomy 4q is variable, and a uniform phenotype has not been identified based on current data.

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