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Medline ® Abstract for Reference 48

of 'Suppurative thyroiditis in children and adolescents'

The emerging echogenic tract sign of pyriform sinus fistula: an early indicator in the recovery stage of acute suppurative thyroiditis.
Park NH, Park HJ, Park CS, Kim MS, Park SI
AJNR Am J Neuroradiol. 2011;32(3):E44. Epub 2010 Feb 4.
AST is commonly associated with pyriform sinus-thyroid fistula in children. Radiologic findings of AST are documented in a few reports. We report a new sign we term the "emerging echogenic tract sign," which reflects a patent air-containing pyriform sinus-thyroid fistula on follow-up US. Recognition of this sign is an important finding suggesting an associated pyriform sinus-thyroid fistula in a patient with AST and also suggesting the adequate timing of barium esophagography to confirm the fistula.
Department of Diagnostic Radiology, Myongji Hospital, Kwandong University, College of Medicine, Goyang, South Korea. nhpark904@kd.ac.kr