There is a low overall prevalence (2.4%) of Graves' disease following I-131 therapy for nodular or diffuse autonomous goiter. However, the prevalence of posttreatment Graves' disease is highly dependent upon pretreatment scintigraphic patterns exhibiting focal-disseminated or disseminated patterns.
There seems to be a correlation between loss of antigenicity and failure of graft incorporation. Therefore, it seems probable, that some bone antigenicity is necessary for the induction of cellular mechanisms during graft incorporation.
In contrast to the multifocal autonomy (MFA), the target dose of 150 to 200 Gy based on total thyroid volume did not result in a comparably high success rate of approximately 95% in disseminated and focal/disseminated types of thyroid autonomy. Therefore, an increase of target dose of 200 to 300 Gy is recommended. The transient FT3 increase particularly observed in FDA and DA in the first weeks following radioiodine therapy makes short-term controls of thyroid function necessary, especially in patients with cardiac risk, in order to initiate necessary therapy.
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