Department of Diagnostic Radiology, Myongji Hospital, Kwandong University, College of Medicine, Goyang, South Korea.
AJNR Am J Neuroradiol. 2011 Mar;32(3):E44-6. doi: 10.3174/ajnr.A2015. 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.
AST 通常与儿童梨状窝-甲状腺瘘有关。AST 的放射学发现已有少数报道。我们报告了一个新的征象，我们称之为“出现的高回声轨迹征”，这反映了随访超声上存在通畅的含气梨状窝-甲状腺瘘。认识到这个征象是一个重要的发现，提示 AST 患者存在相关的梨状窝-甲状腺瘘，并提示适当的时间进行钡餐食管造影以确认瘘管。
