Abstract
Pyriform sinus fistula,owing to rare disease incidence and lacking of awareness,is always a puzzle to neck illness. At the mean time,The frequent delay in accurate diagnosis was reported in the literature. Pyriform sinus fistula should be considered in any children with repeated neck or thyroid infection/mass（ mainly on the left side） . The combination of barium esophagography,CT scan and ultrasound is useful to establish the diagnosis. Intraoperative endoscopy-assisted intubation or methylene blue injection through the internal opening as a guide can facilitate identification of the tract during dissection,and it can effectively reduce the relapse rate. Key words: Pyriform sinus fistula; Barium esophagography; Endoscopy; Diagnosis; Treatment
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