Centromeric instability of chromosomes 1, 9 and 16 with variable immune deficiency. Support of a new syndrome

Area of Science:

• Genetics
• Immunology
• Clinical Medicine

Background:

• Syndromic conditions often present with a complex interplay of genetic and clinical features.
• Immune deficiencies can manifest with varying severity and specific antibody deficiencies.
• Chromosomal instability is a hallmark of several genetic disorders, impacting cellular function.

Observation:

• A case report details a four-month-old female infant presenting with distinct facial dysmorphism.
• The infant exhibits moderate intellectual disability and a significant immune deficiency, characterized by decreased Immunoglobulin G (IgG) and Immunoglobulin A (IgA), and absent Immunoglobulin M (IgM).
• Cytogenetic analysis reveals centromeric instability in chromosomes 1, 9, and 16, with rare involvement of chromosome 2, alongside a predisposition to forming multibranched chromosomal figures.

Findings:

• This case represents the fifth documented instance of this specific constellation of chromosomal and immune abnormalities.
• The consistent pattern of these abnormalities across multiple cases strongly supports the identification of a novel genetic syndrome.
• The observed features suggest a potential autosomal recessive mode of inheritance for this new syndrome.

Implications:

• The identification of this new syndrome expands our understanding of genetic disorders affecting development and immunity.
• Further research into the underlying genetic mechanisms is warranted to elucidate the etiology of this condition.
• Recognition of this syndrome can aid in earlier diagnosis and genetic counseling for affected families.