This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thyroid, Subject name: Surgery
Whole-body iodine scan after total thyroidectomy is not recommended for which thyroid cancer ? 
Select and explain. 
A. Papillary thyroid cancer, B. Anaplastic thyroid cancer, C. Medullary thyroid cancer, D. Follicular thyroid cancer
C: Medullary thyroid cancer
Answer: C: Medullary thyroid cancer 
Explanation: Whole-body iodine scan is recommended for differentiated thyroid cancer , which fulfill following conditions : Tumors - between 1cm-4cm Confined to the thyroid Do not have nodal or distant metastasis, Adverse histologic subtype (tall cell) Vascular invasion. =Unlike differentiated thyroid cancer, Medullary thyroid carcinoma cells do not concentrate radioactive iodine and are not sensitive to manipulation of thyroid-stimulating hormone.