Human reaction to bovine TSH: concise communication.

Area of Science:

• Endocrinology
• Oncology
• Immunology

Background:

• Thyroid cancer management often involves monitoring with thyroglobulin levels.
• Bovine thyroid-stimulating hormone (TSH) has been used to stimulate residual thyroid tissue for diagnostic purposes.
• Allergic reactions to bovine TSH can complicate patient management.

Purpose of the Study:

• To investigate the incidence of allergic reactions to bovine TSH in patients with thyroid cancer.
• To determine the relationship between bovine TSH dosage and the occurrence of allergic reactions.

Main Methods:

• Prospective follow-up of 42 thyroid cancer patients with total thyroid ablation.
• Monitoring for allergic reactions to bovine TSH over a period of up to 25 years.
• Analysis of cumulative TSH doses received by patients who did and did not experience reactions.

Main Results:

• 43% of patients experienced allergic reactions to bovine TSH.
• 57% of patients showed no allergic reactions, even with higher cumulative TSH doses.
• The rate of allergic reactions showed a linear relationship with cumulative TSH dose up to 150 units, after which it was not dose-related.

Conclusions:

• A significant proportion of thyroid cancer patients develop allergic reactions to bovine TSH.
• The dose-response relationship for bovine TSH allergy is complex and not linear beyond a certain cumulative dose.
• Alternative diagnostic strategies or TSH preparations may be considered for patients at risk of allergic reactions.