<prompt> Which one of the following variants of papillary carcinoma thyroid occurs in younger individuals including children with lymphonodal metastases in almost all cases and morphologically simulates Hashimoto thyroiditis is:Tall-cell variantFollicular variantDiffuse sclerosing variantOncocyticvarient  <response>: Ans. c Diffuse sclerosing variantRef: Robbins 9thpg 1097-1098Diffuse sclerosing variant of papillary carcinomaIt occurs in younger individuals, including children.The tumor has a prominent papillary growth pattern intermixed with solid areas containing nests of squamous metaplasia.There is extensive, diffuse fibrosis throughout the thyroid gland, often associated with a prominent lymphocytic infiltrate, simulating Hashimoto thyroiditis.Lymph node metastases are present in almost all cases.Diffuse sclerosing variant carcinomas lack BRAF mutations, but RETPTC translocations are found in approximately half the cases. 