16-year-old boy with a purely cystic thyroid nodule (group A) 16-year-old boy with a purely cystic thyroid nodule (group A).A, Ultrasonogram obtained before ethanol sclerotherapy shows a huge hemorrhagic thyroid nodule.B, Ultrasonogram obtained 2 months after ethanol sclerotherapy reveals the complete disappearance of... 16-year-old boy with a purely cystic thyroid nodule (group A).A, Ultrasonogram obtained before ethanol sclerotherapy shows a huge hemorrhagic thyroid nodule.B, Ultrasonogram obtained 2 months after ethanol sclerotherapy reveals the complete disappearance of the cystic portion of the thyroid nodule and replacement by echogenic material.C, Ultrasonogram obtained 9 months after ethanol sclerotherapy shows a decrease in the size of the postsclerotic thyroid nodule. Dong Wook Kim et al. AJNR Am J Neuroradiol 2005;26:2122-2127 ©2005 by American Society of Neuroradiology