Long-term Outcome of Subacute Thyroiditis.

Area of Science:

• Endocrinology
• Immunology

Background:

• Subacute thyroiditis (SAT) is a rare inflammatory thyroid condition with unclear pathophysiology and outcomes.
• Long-term follow-up data for SAT is limited, hindering prediction of future thyroid function.
• Predictors for the development of hypothyroidism following SAT require further investigation.

Purpose of the Study:

• To investigate the long-term outcomes of subacute thyroiditis (SAT) over a 30-year period.
• To identify predictors for the development of permanent hypothyroidism after SAT.
• To analyze the impact of treatment protocols on SAT outcomes.

Main Methods:

• Retrospective analysis of outcome data from 127 patients diagnosed with SAT.
• Exclusion of patients with pre-existing hypothyroidism or other known causes.
• Evaluation of pre-treatment TSH, gender, age, ultrasound findings, anti-thyroid antibodies, and inflammation markers as predictors.

Main Results:

• Over 26.8% of SAT patients developed permanent hypothyroidism within three years.
• High cumulative prednisolone doses were significantly associated with increased hypothyroidism prevalence.
• Female gender was identified as a significant predictor for developing hypothyroidism (OR: 3.18).

Conclusions:

• Approximately one-quarter of subacute thyroiditis patients develop long-term hypothyroidism.
• Predictors for hypothyroidism include high cumulative steroid doses and female gender.
• Faster diagnosis and steroid tapering may improve euthyroid outcomes in SAT patients.