[Hormonal suppressive therapy of thyroid nodules]

Area of Science:

• Endocrinology
• Oncology

Background:

• Cold thyroid nodules are common, and their management often involves levothyroxine therapy.
• The effectiveness of levothyroxine in reducing cold thyroid nodule volume is not fully established.
• Understanding factors influencing nodule variation is crucial for optimizing treatment strategies.

Purpose of the Study:

• To analyze the effectiveness of levothyroxine in treating cold thyroid nodules.
• To investigate the correlation between thyroid-stimulating hormone (TSH) levels and nodule volume variation.
• To determine if higher TSH-suppressing doses of levothyroxine are more effective than lower doses.

Main Methods:

• A study involving 426 patients with cold thyroid nodules.
• Nodule volume was measured using ultrasonography over a 3 to 18-month treatment period.
• Nodule volume variation was analyzed in relation to TSH levels and other factors (age, sex, familial history, initial volumes, diagnosis date, ultrasound findings, treatment duration).

Main Results:

• Nodule volume increased in 32.6% of patients and significantly decreased (>50%) in 35.8%.
• In 2.8% of cases, nodules disappeared completely.
• No significant correlation was found between nodule volume variation and TSH levels or other studied factors.

Conclusions:

• TSH-suppressing doses of levothyroxine do not appear to offer an advantage in reducing cold thyroid nodule volume compared to lower doses.
• Levothyroxine's effectiveness in reducing cold thyroid nodule size may be independent of TSH levels.
• Further research is needed to identify optimal treatment strategies for cold thyroid nodules.