False about medullary cancer thyroid: (A) Secrete Calcitonin, (B) 20-25% are familial, (C) Diarrhea are seen in 30%, (D) These cancers take up Radioactive Iodine
Answer is D. 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 don't take up RAI* Differentiated thyroid Cancers - Papillary and follicular take up Radio active iodine and used in cases of treatment of high risk cases.