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Related to radioiodine: radioiodine uptake


any radioactive isotope of iodine; of the nine isotopes, iodine 123, iodine 125, and iodine 131 are the most commonly used in diagnosis and treatment of benign and malignant diseases of the thyroid gland and in scintiscans of organs such as the lung, liver, and kidney. Called also radioactive iodine.
radioiodine uptake test one of the most common thyroid function tests; a known quantity of radioiodine is administered and 24 hours later the per cent is calculated that has been absorbed by the thyroid gland. Patients who have recently been exposed to iodine compounds, such as in dietary supplements, contrast media, medications, or antiseptics may not be good candidates for this test.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.


A radioactive isotope of iodine, for example, 123I.
Farlex Partner Medical Dictionary © Farlex 2012


A radioactive isotope of iodine widely used as a tracer in medical diagnosis.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

radioactive iodine

Any of the radionuclides of iodine, the most commonly used of which is beta- and gamma-emitting 131I, with a half-life of 8 days. It is used clinically as an implant for treating thyroid cancer and hyperactivity, and for scintigraphy of other organs. The gamma-emitting 125I has a half-life of 59.4 days and has been used in bioassays, nuclear medicine imaging and in radiation oncology as brachytherapy to treat prostate cancer and brain tumours.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
Radioiodine uptake in the thymus has been reported in some young patients and can be misinterpreted as metastatic/recurrent thyroid cancer [4, 5].
* Postmenopausal women with subclinical hyperthyroidism treated with radioiodine and followed for 2 years did not lose bone from spine or hip, where as untreated women lost bone at both sites (50).
(6.) Jarlov AE, Hegedus L, Kristensen LO, Nygaard B, Hansen JM Is calculation of the dose in radioiodine therapy of hyperthyroidism worthwhile?Clinical Endocrinology 1995; 43: 325-29
Therapy-related myeloid neoplasms following treatment with radioiodine. Haematologica 2012;97:206-12.
It may be that his hyperthyroidism is not well controlled on his current dose of methimazole and that he either needs a higher dose or another treatment modality (like radioiodine therapy).
(15) Hyperthyroidism is commonly treated with medication, such as beta-blockers and antithyroid drugs, radioiodine therapy, and/or thyroid surgery.
For an overactive thyroid, treatments include radioiodine treatment and thyroid surgery.
We describe here an extremely rare case of metachronous quadruple primary cancer with papillary thyroid carcinoma (PTC) that developed chronic lymphocytic leukemia, basal cell carcinoma, and renal cell carcinoma, respectively, over a fifteen years period after radioiodine therapy.