Neurological involvement in patients with primary immunodeficiency

Area of Science:

• Immunology
• Neurology
• Genetics

Background:

• Primary immunodeficiency diseases (PID) are characterized by recurrent infections, allergies, autoimmunity, and malignancies.
• Neurologic symptoms are a significant manifestation in certain PID syndromes, including Ataxia-Telangiectasia (AT), Nijmegen Breakage Syndrome (NBS), and Purine Nucleoside Phosphorylase (PNP) deficiency.
• Pathological mechanisms, DNA repair disorders, metabolic abnormalities, and autoimmunity are linked to neurological conditions in PID.

Purpose of the Study:

• To investigate the spectrum and prevalence of neurological involvement in patients diagnosed with primary immunodeficiency diseases (PID).
• To identify common neurological manifestations and associated PID types.
• To highlight the importance of early diagnosis and intervention for neurological complications in PID.

Main Methods:

• A retrospective analysis was conducted on 108 patients with PID, selected from a larger cohort of 6000 patients.
• Data on neurological symptoms, diagnoses, and neuroimaging findings were collected and analyzed.

Main Results:

• Neurological problems were detected in 108 PID patients, with a median age of onset at 7 years.
• Di George Syndrome (30%) and Common Variable Immunodeficiency (CVID) (27%) were the most prevalent PID types in the cohort.
• Cognitive delay (58%), epilepsy (23%), and ataxia (18%) were the most frequent neurological outcomes. Central nervous system involvement was observed in 99% of patients, with cerebellar atrophy (34%) and white matter lesions (28.4%) being common MRI findings.

Conclusions:

• Neurological manifestations are a significant and frequent complication in patients with primary immunodeficiency diseases.
• The neurological presentation can be the initial sign of certain PIDs, underscoring the need for comprehensive evaluation.
• Prompt diagnosis and management of neurological issues are essential to mitigate long-term damage and improve patient outcomes.