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Thyrotropin-Releasing Hormone (TRH) Test

Specialty:

Endocrinology, Nutrition & Dermatology
Clinical Laboratory

Objective:

ICD-10:

Description:

TSH levels are increased in hypothyroidism when the hypothalamic-pituitary axis is intact, but are decreased in hyperthyroidism due to end-organ overactivity. Thyrotropin-releasing hormone (TRH) normally results in release of TSH from the anterior pituitary. Injection of TRH can be used to assess the release of TSH from the anterior pituitary.

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