Abstract:

Abstract Introduction and Aim: Selective IgE deficiency (SIgED) is currently defined as a significant decrease in serum levels of IgE (≤2 kIU/L) in a patient whose other immunoglobulin levels are normal. The clinical spectrum of SIgED is unknown still. This study aimed to determine the relationship between SIgED and autoimmune diseases in an allergy and immunology clinic of a university hospital. Methods: A retrospective study of the data obtained from medical records of 40 patients, 27 were female (67.5%), and the mean age was 39 years (range 20–69 years) and IgE levels of ≤2.0 kIU/L with normal immunoglobulin (Ig) IgG, IgA, and IgM levels. Results: A total of 40 patients , 27 females (67.5 %) and 13 males (32.5%), were included in the study. The mean age of the patients was 39 ±13.06 years (range 20–69). In the present study, 35% of patients had an autoimmune disease (N:14), however 65% of patients did not have any autoimmune disease (N:26). Hashimoto’s thyroiditis being the most frequent (N:6) in 15% which is followed by systemic lupus erythematosus (SLE) (N:3) in 7.5%, celiac disease (N: 2) in 5%, chronic spontaneous urticaria (CSU) (N:1) in 2.5%, vitiligo (N:1) in 2.5%, type 1 diabetes mellitus (DM) (N:1) in 2.5%. Conclusion: SIgED, should be defined clearly with cut-off values of IgE. Physicians should show more attention to the low IgE values and investigate patients about autoimmune diseases which can be seen together with SIgED. More studies should be conducted to investigate associated diseases with SIgED.

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