proved to be equally effective in reducing thyroid nodule size. Financial Disclosure: This work was supported by grants of Ministero della Salute and of MURST (COFIN 2004) to S Filetti.

131 I thyroid scintigraphy showed a 24-hour thyroid uptake of 66%,with diffuse homogeneous distribution of the tracer. Ultra-sonography (US) showed an enlarged thyroid gland (estimated weight ...