Question

a patient presents with high thyrotropin - releasing hormone, high thyroid stimulating hormone, and low t3/t4. which of the following is the most likely diagnosis? a) secondary hypothyroidism b) primary hyperthyroidism c) secondary hyperthyroidism d) primary hypothyroidism

Explanation:

In primary hypothyroidism, the thyroid gland itself is defective. The body senses low levels of T3 and T4 (thyroid - hormones) and responds by increasing the production of Thyrotropin - Releasing Hormone (TRH) from the hypothalamus and Thyroid - Stimulating Hormone (TSH) from the pituitary gland in an attempt to stimulate the thyroid. In secondary hypothyroidism, TSH is low. Hyperthyroidism is characterized by high T3/T4 levels.

Answer:

d) Primary Hypothyroidism