This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid Gland, Subject name: Surgery
Which of the following is true about medullary cancer thyroid? 
Select and explain. 
A. MET gene Positive, B. Elevated levels of serum calcitonin+, C. MEN I syndrome associated, D. Most common thyroid cancer
B: Elevated levels of serum calcitonin+
Answer: B: Elevated levels of serum calcitonin+ 
Explanation: Ans. (b) Elevated levels of Serum calcitonin seenRef: Schwartz Page 1546/10th edition* Medullary cancer is associated with RET oncogene mutation.* MEN-2 Syndromes are associated with MTC* Most common thyroid cancer is Papillary cancer