CVID With Unusual Peripheral Mononeuropathy and Associated IL-7 Receptor Mutation

Area of Science:

• Immunology
• Neurology
• Genetics

Background:

• Common variable immunodeficiency (CVID) is the most frequent symptomatic primary immunodeficiency, characterized by hypogammaglobulinemia.
• CVID manifestations include recurrent infections, autoimmunity, and malignancy, with peripheral neuropathy being a rare association.
• The IL-7 receptor signaling pathway is crucial for immune cell development and has been linked to autoimmune conditions.

Purpose of the Study:

• To report a rare case of CVID presenting with peripheral neuropathy.
• To investigate the genetic basis of the patient's condition, focusing on potential links between CVID, neuropathy, and immune signaling pathways.
• To explore the role of IL-7 receptor gene variants in CVID-associated neurological complications.

Main Methods:

• Clinical case presentation of a 38-year-old female with a history of recurrent infections and new-onset peripheral neuropathy.
• Diagnostic workup including assessment of immunoglobulin levels and immune responses to identify CVID.
• Genetic analysis using a panel to identify pathogenic variants in relevant genes, specifically the IL-7 receptor gene.

Main Results:

• The patient met diagnostic criteria for CVID, exhibiting severe hypogammaglobulinemia and impaired immune responses.
• Neurological examination revealed symptoms consistent with peripheral neuropathy, including pain, foot drop, and sensory loss.
• Genetic testing identified a pathogenic heterozygous variant in the IL-7 receptor gene.

Conclusions:

• This case underscores the rare association between CVID and peripheral neuropathy.
• A pathogenic variant in the IL-7 receptor gene was identified in a CVID patient with neuropathy, suggesting a potential genetic link.
• Further research is warranted to elucidate the clinical significance of IL-7 receptor gene variants in the pathogenesis of CVID-related neurological disorders.