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Familial inv(2) (p2300q11.2).

M T Sole-Pujol, H Rivera, L P Castro-Felix

Journal De Genetique Humaine

|January 1, 1985

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A novel chromosome 2 inversion was identified in a family over two generations. This genetic finding appears unrelated to birth defects and does not impact reproductive health.

Area of Science:

Human genetics
Cytogenetics
Reproductive biology

Background:

Holoprosencephaly is a complex congenital disorder with varied etiology.
Karyotyping is a standard diagnostic tool for identifying chromosomal abnormalities.
Familial inheritance patterns of genetic conditions are crucial for genetic counseling.

Observation:

A previously undocumented inversion on chromosome 2, denoted inv(2)(p2300q11.2), was observed in two generations of a family.
The family was initially assessed due to a liveborn infant diagnosed with holoprosencephaly, who presented with a normal karyotype.
The identified inversion was likely incidental and not the cause of the infant's malformations.

Findings:

The inv(2)(p2300q11.2) is a novel chromosomal rearrangement.

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This specific inversion does not appear to compromise reproductive fitness in the studied family.

The inversion does not lead to viable aneuploidies through recombination.

Implications:

This discovery expands the known spectrum of chromosomal variations in humans.
Understanding such inversions is vital for accurate genetic diagnosis and risk assessment.
Further research may elucidate the precise role, if any, of such inversions in reproductive outcomes.