title: Unusual calcification in mixed papillary and follicular carcinoma of the thyroid gland.
abstract: An unusual egg-shell calcification was found in the thyroid gland on a routine radiograph. The 99mTc-pertechnetate thyroid image showed a cold nodule in the inferior pole of the left lobe which proved to be mixed papillary-follicular carcinoma. There was no characteristic pattern of calcification in the thyroid gland which would permit precise diagnosis of cancer; however, psammomatous calcification frequently occurs in papillary carcinoma of the thyroid.
mesh_terms: D000230:Adenocarcinoma / Q000000981:diagnostic imaging*; D002114:Calcinosis / Q000000981:diagnostic imaging*; D005260:Female; D006801:Humans; D008875:Middle Aged; D011859:Radiography; D013964:Thyroid Neoplasms / Q000000981:diagnostic imaging*