Question 1  The most common cause of hyperthyroidism is:  Graves disease. A pitu

Question 1 
The most common cause of hyperthyroidism is: 
Graves disease.
A pituitary tumor.
Subacute thyroiditis.
A toxic uninodulargoiter.
Question 2 
An elderly client presents with atrial fibrillation. Which of the following lab tests is important in forming the diagnosis? 
Comprehensive metabolic panel (CMP).
Thyroid-stimulating hormone (TSH).
C-reactive protein (CRP).
Complete blood count (CBC).
Question 3 
A client presents with clinical manifestations of hyperthyroidism. The differential diagnosis includes Graves disease and subacute thyroiditis. Which of the following findings is consistent with subacute thyroiditis? 
A 24-hour radioactive iodine uptake (RAIU) demonstrating increased uptake.
A 24-hour radioactive iodine uptake (RAIU) demonstrating a “cold” nodule.
A 24-hour radioactive iodine uptake (RAIU) demonstrating decreased uptake.
A fine-needle aspiration is required for diagnosis of subacute thyroiditis.