Question

Which of the following lab values would most likely confirm a diagnosis of hyperthyroidism?

1) Increased T3 and T4 levels
2) Decreased TSH levels
3) Elevated thyroid-stimulating immunoglobulins
4) All of the above

Answer 1

The lab value that most likely confirms a diagnosis of hyperthyroidism is decreased TSH levels.

Step-by-step explanation:

The lab value most likely to confirm a diagnosis of hyperthyroidism is 2) Decreased TSH levels. Hyperthyroidism is characterized by an overactive thyroid gland that produces excessive amounts of thyroid hormone. In response, the pituitary gland decreases the production of thyroid-stimulating hormone (TSH) to try to regulate the levels of thyroid hormone. Therefore, decreased TSH levels are often seen in individuals with hyperthyroidism.