%0 Journal Article %A N.H. Park %A H.J. Park %A C.S. Park %A M.S. Kim %A S.I. Park %T The Emerging Echogenic Tract Sign of Pyriform Sinus Fistula: An Early Indicator in the Recovery Stage of Acute Suppurative Thyroiditis %D 2010 %R 10.3174/ajnr.A2015 %J American Journal of Neuroradiology %U https://www.ajnr.org/content/ajnr/early/2010/02/04/ajnr.A2015.full.pdf