<prompt> False about medullary cancer thyroidSecrete Calcitonin20-25 are familialDiarrhea are seen in 30These cancers take up Radioactive Iodine  <response>: Ans. d These cancers take up Radio iodineRef: Bailey and Love 27th Edition Page 820 Medullary thyroid cancers are not hormone dependent Not TSH dependent They dont take up RAI Differentiated thyroid Cancers - Papillary and follicular take up Radio active iodine and used in cases of treatment of high risk cases. 