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+Hyperthyroidism
*Disappearance of contrast in all abdominal structures except for tissue with [[fibrosis]], which appears more radiodense.
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==Hyperthyroidism==
Patients at risk for contrast-induced hyperthyroidism are mainly those with diagnosed yet untreated hyperthyroidism, which may motivate contrast-free alternatives such as using a different modality.<ref name=UpToDate-thyr>{{cite web|url=https://www.uptodate.com/contents/iodine-induced-thyroid-dysfunction|title=Iodine-induced thyroid dysfunction|author=Martin I Surks, MD|website=UpToDate}} This topic last updated: Apr 02, 2019.</ref>
In older patients with multinodular goiter and borderline low or subnormal TSH concentrations, a suggested measure is measurement of thyroid function tests three to four weeks after contrast administration.<ref name=UpToDate-thyr/> Limited evidence suggests that antithyroid agents before the investigation may blunt or prevent hyperthyroidism.<ref name=UpToDate-thyr/>
==Locations==
