Medullary carcinoma of the thyroid gland associated with Hashimoto’s thyroiditis

Profile of Hashimoto's Thyroiditis in Sri Lankans: Is There an Increased Risk of Ancillary Pathologies in Hashimoto's Thyroiditis?

“…Also cytological features of Hashimoto's thyroiditis may dominate the smears and overshadow the coexisting neoplasm causing false negative results. With reference to prognosis it has been reported that malignant neoplasms associated with Hashimoto's thyroiditis are usually of lower grades of malignancy which relates to longer survival of the patients [ 6 , 15 ].…”

“…Hashimoto's thyroiditis has been reported to be associated with many neoplastic and nonneoplastic thyroid pathologies. The rate of occurrence of thyroid malignancies in patients with Hashimoto's thyroiditis ranges from 0.5% to 14% [ 1 , 6 ]. The more commonly reported malignancies are B- and T-cell Non-Hodgkin's lymphoma and Papillary carcinoma of the thyroid [ 2 , 7 ].…”

“…The more commonly reported malignancies are B- and T-cell Non-Hodgkin's lymphoma and Papillary carcinoma of the thyroid [ 2 , 7 ]. Other neoplasms such as follicular carcinoma [ 2 ], anaplastic thyroid carcinoma [ 2 ], medullary carcinoma [ 2 , 6 ], Hodgkin's lymphoma [ 7 ], mucoepidermoid thyroid carcinoma [ 8 ], and primary squamous cell carcinoma [ 9 ] have also been reported. A review of the literature revealed coexistence with many benign lesions such as intrathyroidal lymphoepithelial cysts [ 10 , 11 ], Riedel's thyroiditis [ 12 ], benign thyroid nodules, and goiter [ 13 ] and plasma cell granuloma [ 14 ].…”