A patient with long standing multinodular goitre develops hoarseness of voice; also, the swelling undergoes sudden increase in size. Likely diagnosis is
Follicular ca
Papillary ca
Medullary ca
Anaplastic ca
Ans. is 'a' i.e., Follicular Ca History of sudden growth in a long standing goiter and hoarseness are suggestive of malignant change. Most common carcinoma to develop in developing in long standing multinodular goiter is Follicular carcinoma.