Is Vitamin D Deficiency Associated with Chronic Lymphocytic Thyroiditis?

Area of Science:

• Endocrinology
• Immunology
• Nutritional Science

Background:

• Vitamin D deficiency is a widespread global health issue with recognized extraskeletal effects.
• Chronic lymphocytic thyroiditis (Hashimoto's thyroiditis) is an autoimmune thyroid disorder.
• Existing research suggests a potential association between autoimmune thyroid diseases and vitamin D deficiency, though this remains debated.

Purpose of the Study:

• To investigate the relationship between histopathologically diagnosed lymphocytic thyroiditis and vitamin D deficiency.
• To determine if vitamin D levels or deficiency rates differ in patients with lymphocytic thyroiditis compared to those without.

Main Methods:

• Retrospective analysis of 256 patients who underwent surgery between 2012 and 2017.
• Patients were categorized into two groups based on histopathological findings: presence (Group 1) or absence (Group 2) of lymphocytic thyroiditis.
• Vitamin D deficiency was defined as levels <20 ng/mL; insufficiency as 21-29 ng/mL.

Main Results:

• No significant difference in mean vitamin D levels or vitamin D deficiency rates was observed between Group 1 (67.6% deficiency) and Group 2 (72.3% deficiency).
• The study found no significant correlation between lymphocytic thyroiditis and vitamin D levels or deficiency.
• A positive correlation was noted between lymphocytic thyroiditis and age, TSH, anti-thyroglobulin, and anti-TPO levels, but not vitamin D.

Conclusions:

• Lymphocytic thyroiditis is not associated with vitamin D deficiency.
• Vitamin D status does not appear to be a significant factor in the presence of lymphocytic thyroiditis based on this study's findings.