<prompt> Treatment of medullary Ca thyroid is:Total thyroidectomy onlyTotal thyroidectomy Radical neck dissectionTotal thyroidectomy Radio Iodine TherapyTotal thyroidectomy prophylactic CND  <response>: Ans. d Total thyroidectomy Prophylactic Central Neck Node dissection CNDRef: Schwartz 10th Edition Page 1549 Routine Central neck node dissection must be done for Medullary cancers of Thyroid. 