99mTc-pertechnetate imaging of clinically palpable thyroid nodule

334 patients (female: 298, male: 36) who had clinically palpable thyroid nodules and were operated from March, 1974 through June, 1980 were reviewed. All was taken thyroid scan using 99mTc-pertechnetate and was compared to histopathological diagnosis. Solitary cold nodule was the most common finding of thyroid scan (255/334: 76.38%) and 171 of them (67.06%) were adenoma and 44 (13.17%) carcinoma. So 44 of 56 cancers was solitary cold nodule. The frequency of histopathological findings of thyroid nodules was as follow: 1. Adenoma 211(63. 17%) 2. Cancer 56 (16.17%) 3. Adenomatous nodule 28 (8.38%) 4. Cyst 18 (5.39%) 5. Thyroiditis 16 (4.79%) 6. Diffuse hyperthyroidism 5 (1.50%)