<prompt> Most common histological type of the thyroid carcinoma is:Medullary typeFollicular typePapillary typeAnaplastic type  <response>: 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: Robbins Basic Pathology, 7th Edition, Page 1177; Harrisons Internal Medicine, 18th Edition, Page 2243; Bailey and Loves Sho Practice of Surgery, 25th Edition, Page 792 