<prompt> A patient with long-standing multinodular goitre develops hoarseness of voice; also, the swelling undergoes a sudden increase in size. Likely diagnosis isFollicular caPapillary caMedullary caAnaplastic ca  <response>: History of sudden growth in a long-standing goitre and hoarseness are suggestive of malignant change.Most common carcinoma to develop in developing in long-standing multinodular goitre is Follicular carcinoma. 