Serum thyroglobulin levels in hypofunctioning nodules before and after surgery

Area of Science:

• Endocrinology
• Thyroidology
• Surgical Oncology

Background:

• Benign thyroid nodules are common, and their impact on serum thyroglobulin (Tg) levels requires clarification.
• Distinguishing between solitary nodules and those within heterogeneous thyroid glands is crucial for understanding Tg behavior.

Purpose of the Study:

• To investigate serum thyroglobulin (Tg) levels in euthyroid patients with benign hypofunctioning thyroid nodules before and after surgical intervention.
• To compare Tg levels in patients with solitary nodules versus those with nodules in enlarged/heterogeneous thyroid glands.

Main Methods:

• Serum Tg levels were measured in 34 patients with benign hypofunctioning nodules and 30 controls.
• Patients were categorized into two groups based on thyroid imaging: solitary nodule (Group 1) and nodule within an enlarged/heterogeneous gland (Group 2).
• Measurements were taken pre- and post-surgical removal of the nodule.

Main Results:

• Pre-surgery, mean Tg levels were significantly elevated in both patient groups compared to controls.
• No significant difference in pre-operative Tg levels was observed between Group 1 and Group 2.
• Post-surgery, Tg levels normalized in Group 1 but remained elevated in Group 2.

Conclusions:

• Elevated serum Tg levels in patients with benign hypofunctioning nodules are associated with the nodule itself and/or heterogeneous thyroid tissue.
• Serum Tg determination can be a valuable tool for monitoring operated hypofunctioning nodules and detecting residual thyroid abnormalities.