Medullary thyroid carcinoma is associated with?
MEN I
MEN II
MEN III
MEN IV
Ans. is 'b' i.e., MEN II About 70% of tumors arise sporadically. The remainder occurs in the rsetting of MEN syndrome 2A or 2B or as familial tumors without an associated MEN syndrome (familial medullary thyroid carcinoma, or FMTC.