(a) whole body scan performed after treatment with radioactive iodine or surgery; (b) focal uptake with centrally hypoactive foci before treatment; (c) hot nodule detected post-treatment with radioactive iodine; (d) patient was treated with radioactive iodine, achieved euthyroidism, and became negative for TRAb; a hot nodule was detected on follow-up on both ultrasound and nuclear scan; (ab) cold nodule
before treatment and hot nodule after treatment with radioactive iodine.
Role of fine needle aspiration cytology (FNAC) in a cold nodule
of thyroid and its comparison with histopathology.
6b, blue line), while minimum frost flower temperatures at the cold nodule
locations decreased toward the air temperature throughout the overnight period of frost flower growth (Fig.
If the scan shows a cold nodule
, the patient should be referred for surgery.
Economic and an accurate procedure used in the diagnosis of thyroid Lesions, particularly in the presence of cold nodule
Thirteen respondents said that a dominant nodule would lead to an FNA, and 11 respondents said that a cold nodule
would be a criterion for an FNA.
While her thyroid uptake scans previously identified a cold nodule
in the lower right thyroid lobe, her surgical pathologic specimen of the left thyroid lobe identified the anaplastic carcinomic tissue while her right thyroid nodule was negative for anaplastic disease.
 Thyroid isotope scan using technetium detect hot or cold nodule
. Hot nodules are functioning and usually benign, but cold nodules
are nonfunctioning and around 20% may be malignant.
A hot nodule is almost always benign however a cold nodule
requires further diagnostic evaluation.
(2) Radioactive iodine [sup.131] I scintigraphy will show a poorly defined cold nodule
. (1) Chest x-rays may demonstrate a lung metastasis or a deviation or narrowing of the trachea.
) are considered as risk factors for thyroid malignancy.
Most common form of thyrotoxicosis was Graves\' disease, with diffuse toxic goiter affecting 269 (53%) patients; followed by toxic multinodular goiter in 102 (20.1%); solitary toxic nodule in 56 (11%); thyrotoxicosis without goiter in 44 (8.7%); subclinical hyperthyroidism in 22 (4.3.%); thyroiditis in 9 (1.8%); and thyrotoxicosis with solitary cold nodule
in 4 (0.9%).