Study note
SurgeryThe thyroid gland

Radioiodine for thyrotoxicosis

THE CONTEXT
Radioiodine reduces functioning thyroid tissue by destroying thyroid cells.

Mechanism and advantages

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Radioiodine destroys thyroid cells and reduces the mass of functioning thyroid tissue below a critical level, as occurs with thyroidectomy.
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Treatment avoids surgery and prolonged drug therapy.

Requirements and disadvantages

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Isotope facilities must be available.
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The patient must be quarantined while radiation levels are high and must avoid pregnancy and close physical contact, particularly with children.
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Eye signs may be aggravated.
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