[The hypothalamo-hypophyseal system in patients with multinodular colloid euthyroid goiter]

Area of Science:

• Endocrinology
• Thyroidology
• Internal Medicine

Background:

• Multinodular colloid euthyroid goiter is a common thyroid condition.
• Accurate assessment of thyroid function is crucial for patient management.
• The thyrotropin-releasing hormone (TRH) test is a diagnostic tool for pituitary-thyroid axis evaluation.

Purpose of the Study:

• To investigate pituitary TTH reserve in patients with multinodular euthyroid goiter.
• To evaluate the utility of the TRH test in identifying subclinical thyroid dysfunction.
• To explore potential growth factor involvement in goiter pathogenesis.

Main Methods:

• Eighty patients with multinodular colloidal euthyroid goiter were assessed.
• The TRH stimulation test was performed on 22 patients and 7 healthy controls.
• Analysis of TSH (thyroid-stimulating hormone) and STH (somatotropic hormone) responses to TRH.

Main Results:

• A significant tendency towards reduced pituitary TTH reserve was observed in patients.
• TRH test results suggested latent hyperthyroidism in some patients, particularly those with Stage IV goiter.
• Three distinct STH reaction patterns were identified in response to TRH.

Conclusions:

• Clinical euthyroid diagnosis may be insufficient for patients with multinodular goiter.
• The TRH test can identify subclinical thyroid dysfunction, classifying some patients as having latent hyperthyroidism.
• Somatotropic hormone (STH) may play a role as a growth factor in the pathogenesis of multinodular colloid euthyroid goiter.