Never use in the event you or your family Have a very record of the sort of thyr oid most cancers referred to as MTC (medullary thyr oid carcinoma) or Gentlemen 2 (a number of endocrine neoplasia syndrome).you or any of your family have at any time had a type of thyr oid cancer known as medullary thyr oid carcinoma (MTC) or if you have an endocrine