The emerging echogenic tract sign of pyriform sinus fistula: an early indicator in the recovery stage of acute suppurative thyroiditis.
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
N H
NH
Park
H J
HJ
Park
C S
CS
Park
M S
MS
Kim
S I
SI
Park
D002648:Child; D005260:Female; D020199:Hematoma, Subdural, Acute / Q000150:complications* / Q000000981:diagnostic imaging*; D006801:Humans; D056144:Pyriform Sinus / Q000002:abnormalities* / Q000000981:diagnostic imaging*; D016156:Respiratory Tract Fistula / Q000150:complications* / Q000000981:diagnostic imaging*; D014463:Ultrasonography / Q000379:methods*