Increased malignancy incidence in IgE deficient patients not due to concomitant Common Variable Immunodeficiency

Area of Science:

• Immunology
• Oncology
• Clinical Medicine

Background:

• The clinical significance of Immunoglobulin E (IgE) deficiency remains poorly understood.
• Limited data exists on the clinical characteristics of IgE deficiency in patients with Common Variable Immunodeficiency (CVID).

Purpose of the Study:

• To investigate the clinical and laboratory distinctions between patients with and without IgE deficiency.
• To compare outcomes in patients with and without CVID, considering IgE levels.

Main Methods:

• Retrospective analysis of adult patients with measured total serum IgE levels from 2010-2015.
• Defined IgE deficiency as levels <2.5 kU/L.
• Utilized Clinical Looking Glass software to identify comorbidities, including CVID and malignancy.

Main Results:

• 2.7% of 2,339 patients exhibited IgE deficiency. A higher prevalence of CVID was observed in the IgE-deficient group (22% vs 2.7%).
• Patients with IgE deficiency showed a significantly higher rate of prior malignancy (33% vs 8.7%, P=.001).
• In CVID patients, IgE deficiency correlated with increased prior malignancy rates (43% vs 13%, P=.009).

Conclusions:

• Prior malignancy rates are significantly elevated in patients with IgE deficiency, irrespective of CVID status.
• IgE deficiency, particularly in conjunction with CVID, indicates a heightened risk for prior malignancy.
• IgE deficiency does not appear to correlate with disease severity in CVID patients.