Use the following information to determine the best answer N

Use the following information to determine the best answer. Normal serum levels for T_3, T_4, and TSH are as follows: T_3 90 to 230 ng/dl T4 5 to 13.5 mcg/dl TSH 15 mIU/L Consider the following laboratory results of thyroid function and TSH levels. Based on these laboratory results, which patient is most likely to have the following pathologic destructive tumor of anterior pituitary that destroys TSH secreting cells?

Solution

Patient B.since there is a destructive tumor in anterior pituatory which destroys TSH secreting cells,the TSH will be decreased beyond normal and T3 and T4 will increase enormously.