Imaging of thyroid tumors with RI-scintigraphy and ultrasonography.
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概要
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There are many kinds of imaging examinations for the diagnosis of thyroid tumors. Among them, RI-scintigraphy and ultrasonography were investigated and their results were evaluated. In 35 patients who had been operated on and diagnosed histopathologically, the correlation between imaging examination and histopathological examination was determined.1) Histopathological examination showed 14 cases of cancer (7 follicular adenocarcinomas, 6 papillary adenocarcinomas and 1 medullary carcinoma), 12 adenomas, 2 cysts, 3 adenomatous goiters and 4 cases of chronic thyroiditis.2) RI-scintigraphy was performed with 99mTc and 201Tl. In early scans, 7 of 14 cases showing positive 201Tl scans and negative 99mTc scans were malignant and in delayed scans, 6 of 11 cases showing positive 201Tl scans were malignant.3) Ultrasonic examinations showed 14 of 14 cases to have a malignant pattern by Fujimoto and Oka's classification, and all 14 were malignant histopathologically; 13 of the 14 cases showed malignancy by Shoji's scoring method.