Question

What thyroid test results are seen in Grave's disease (primary hyperthyroidism)?

a) Elevated TSH and low T4
b) Elevated TSH and high T4
c) Low TSH and low T4
d) Low TSH and high T4

Answer 1

In Grave's disease, a type of primary hyperthyroidism, thyroid test results typically show low TSH and high T4, indicating an overactive thyroid gland producing too much thyroid hormone.

Step-by-step explanation:

In Grave's disease, which is a type of primary hyperthyroidism, the thyroid gland produces excessive amounts of thyroid hormones. This disease prompts the production of thyroid-stimulating immunoglobulin (TSI), which can either stimulate the thyroid to overproduce thyroid hormones or block thyroid hormone production. However, typically TSI stimulates the thyroid resulting in hyperthyroidism. The feedback mechanism in the body will detect the high levels of thyroid hormones, leading to a suppressed release of thyroid-stimulating hormone (TSH) from the pituitary gland. Therefore, the typical thyroid test results for someone with Grave's disease would show low TSH and high T4. This answers the original question: What thyroid test results are seen in Grave's disease (primary hyperthyroidism)? The correct option is d) Low TSH and high T4.