Association between systemic lupus erythematosus and autoimmune thyroid dysfunction in pediatric population: a single center experience

Abstract Background Systemic Lupus Erythematosus (SLE) patients are more likely than the general population to suffer from thyroid illness. The major goal was to assess the thyroid dysfunctions due to immunological factors in Egyptian SLE children and how they are related to the course and severity of the illness. Methods Fifty children and adolescents with SLE are included in this cross-sectional observational study. Every patient underwent a thorough physical examination and a comprehensive history taking. An enzyme-linked immunosorbent assay (ELISA) approach was used to evaluate the thyroid profile, anti-thyroglobulin (Anti-TG), and anti-thyroid peroxidase (anti-TPO) antibodies. Results Of the 50 patients, the female: male ratio (F: M = 7:1) was 44 females and 6 males (12%). They were between the ages of 5 and 17. Out of the patients, thirty-two (64%) had thyroid dysfunctions, 19 (38%) had euthyroid sick syndrome, ten (20%) had overt hypothyroidism, three (6%) had subclinical hypothyroidism, and none had hyperthyroidism. Of the 50 patients, one (2%) had increased anti-TPO, whereas all other patients had normal anti-TG levels. A statistically significant negative correlation (p-value 0.007) was seen between the disease duration and free thyroxine (FT4). Furthermore, a significant negative correlation (p-values 0.015 and 0.028) was found when comparing the disease duration with thyroid antibodies (anti-TG and anti-TPO). Conclusion In Juvenile Systemic Lupus Erythematosus (JSLE), thyroid dysfunctions can be identified. The disease duration but not its activity was significantly correlated with thyroid antibodies. For children with JSLE, thyroid function testing should be done on a regular basis. It is preferable to carry out additional thyroid antibody tests when necessary.