Medullary Thyroid Cancer
Medullary thyroid cancer (MTC) accounts for 5-10% of all thyroid cancers. MTC is a rare type of thyroid cancer that comes from a group of thyroid cells that are called parafollicular C-cells. These C-cells are different from the cells in differentiated thyroid cancer in the sense that they do not make thyroid hormone, they are not responsive to TSH stimulation, and they make a different protein called calcitonin. There are two types of medullary thyroid cancer: sporadic and familial.