Is there an association between endometriosis and thyroid autoimmunity?

Area of Science:

• Reproductive Endocrinology
• Immunology
• Thyroidology

Background:

• Non-uterine endometrial implants may express thyroid-stimulating hormone receptors, potentially leading to thyroid autoimmunity.
• Investigating the link between endometriosis and thyroid disease is crucial for understanding associated health risks.

Purpose of the Study:

• To compare autoantibody positivity in patients with and without endometriosis.
• To determine differences in thyroid disease incidence between these groups.

Main Methods:

• A prospective observational study involving 102 women with benign gynecological diseases.
• Participants were divided into endometriosis (n=51) and control (n=51) groups.
• Blood tests measured thyroid-stimulating hormone, free thyroxine (fT4), thyroid-stimulating immunoglobulin, and anti-thyroid peroxidase antibody levels.

Main Results:

• Endometriosis patients showed significantly lower mean fT4 levels compared to controls (p=0.002).
• Higher anti-thyroid peroxidase antibody levels were observed in cases with bilateral endometrioma versus unilateral (p=0.028).
• A significant positive relationship was found between endometriosis size and anti-thyroid peroxidase antibody values (p=0.011).

Conclusions:

• Endometrioma diameter is associated with anti-thyroid peroxidase antibody values.
• This finding suggests a potential link between endometriosis and thyroid autoimmunity, warranting further investigation.