This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Surgery
[{'content': 'Most common histological type of the thyroid carcinoma is: \nSelect and explain. \nA. Medullary type, B. Follicular type, C. Papillary type, D. Anaplastic type', 'role': 'user'}, {'content': "Answer: C \nExplanation: Thyroid cancers are classified according to their histopathological characteristics and they are: ? Papillary thyroid cancer (75% to 85% of cases ) - often in young females - excellent prognosis ? Follicular thyroid cancer (10% to 20% of cases ) ? Medullary thyroid cancer (5% to 8% of cases)- cancer of the parafollicular cells, often pa of MEN-2 syndrome. ? Anaplastic thyroid cancer (Less than 5%). It is not responsive to treatment and can cause pressure symptoms. ? O thers ? ? Lymphoma ? ? Squamous cell carcinoma, sarcoma Ref: Robbin's Basic Pathology, 7th Edition, Page 1177; Harrison's Internal Medicine, 18th Edition, Page 2243; Bailey and Love's Sho Practice of Surgery, 25th Edition, Page 792", 'role': 'assistant'}]