introduction: various radiopharmaceuticals, including 67ga, 201tl, and 99mtc-sestamibi have been used to differentiate benign from malignant thyroid nodules. 99mtc-tetrofosmin, a lipophilic cationic radiotracer, and 99mtc-sestamibi have also been reported to accumulate in thyroid tumors. in this study, we evaluated the role of 99mtc-tetrofosmin in the differentiation of malignant from benign th...

PURPOSE In cases of thyroid toxic autonomous nodule, anterior projection of Tc-99m pertechnetate image shows a hot nodule that occupies most, or the entire thyroid lobe with near-total or total suppression of the contra lateral lobe. In this case is very difficult to distinguish toxic nodule from lobe agenesis. Our interest was to estimate and determinate the rate of radioactivity when the sour...

BACKGROUND In our daily experience, the differentiation between a cold and hot nodule is a very important factor for further clinical management of the patient. In this study, we compared the characteristics of incidentally found thyroid nodules detected on computed tomography (CT) to thyroid scintigraphy (TS). METHODS Diagnostic reports from chest CT with intravenous contrast and TS examinat...

A 63 years old woman with Hashimoto's thyroiditis, on thyroxin treatment presented imaging studies concordant with a multinodular goiter, a "hot" nodule in the left lobe and partial suppression of the right lobe. After thyroxin withdrawal overt hypothyroidism developed, yet the patient's imaging studies were not altered. This is a case of hypothyroidism in a patient with Hashimoto's thyroiditi...

Differentiated thyroid cancer rarely occurs in association with hyperfunctioning nodules. We describe a case of a 47-year-old woman who developed symptoms of hyperthyroidism associated with a palpable thyroid nodule. Thyroid scintigraphy showed an autonomous nodule, and fine-needle aspiration biopsy was suggestive of papillary carcinoma. Laboratorial findings were consistent with the diagnosis ...

Differentiated thyroid cancer rarely occurs in association with hyperfunctioning nodules. We describe a case of a 47-year-old woman who developed symptoms of hyperthyroidism associated with a palpable thyroid nodule. Thyroid scintigraphy showed an autonomous nodule, and fine-needle aspiration biopsy was suggestive of papillary carcinoma. Laboratorial findings were consistent with the diagnosis ...

Toxic thyroid adenoma presenting as hypokalemic periodic paralysis is extraordinarily rare. We describe a 26-year-old Japanese man who suffered from acute and painful muscle weakness of extremity in the morning. Physical examination showed a left anterior neck mass and laboratory tests revealed hypokalemia during his paralysis, and thyrotoxicosis. Neck sonogram showed a solitary nodule in the l...

A 51-year-old female patient presented with atypical chest pain, laryngo-oesophageal reflux, increased levels of serum calcium and parathyroid hormone. Ultrasonography showed a multinodular goiter with a prominent solid nodule in the lower left thyroid lobe and a solid hypoechoic nodule outside this area.Tc99m-sestamibi parathyroid scintigraphy was performed to investigate a primary hyperparath...

Background:  Hashimotochr('39')s thyroiditis can be present with a localized palpable nodule though presentation as a hyperfunction "nodule" is extremely rare.  The first case of Hashimotochr('39')s thyroiditis and hot nodule was reported in 1971 by warner. Case Presentation: We reported a 26-year-old hypothyroid woman in Hashimotochr('39')s thyroiditis background with a hyperactive thyroid no...

A 59-year-old woman with papillary thyroid carcinoma inside of an autonomously functioning thyroid nodule is described in this report. The patient was referred to our clinic because of rapid weight loss and swelling on the left side of the neck. Ultrasonography of the thyroid demonstrated a nonhomogeneous nodule in the lower part of an enlarged left lobe. Both 99mTc and 123I thyroid scintigraph...