Surgery>>>>>Thyroid, Parathyroid, and Adrenal
Question 7#

 In North America, hyperthyroidism is most often caused by:

A. Toxic multinodular goiter
B. Diffuse toxic goiter (Graves disease)
C. Thyroid cancer
D. Thyroid stimulating hormone-secreting pituitary adenoma

Correct Answer is B

Comment:

Graves disease, named after Robert Graves, the Irish physician who described the disorder in three patients in 1835, is the most common cause of hyperthyroidism in North America, and accounts for 60 to 80% of cases.