Malignancy in a multinodular goiter is most often:-
Follicular ca: - Seen in iodine deficient areas - M/C malignancy in long standing goiter - M/c malignancy in multinodular goiter Papillary ca: - Seen in iodine sufficient areas - M/C thyroid malignancy Anaplastic ca: - Rare; m/c seen in females - Usually seen in 7th - 8th decade of life Medullary ca: - Arise from Parafollicular C cells - C cells derived from ultimobranchial bodies
Follicular carcinoma
Papillary carcinoma
Anaplastic carcinoma
Medullary carcinoma
FMGE 2018