Letter to the editor: Response

We thanks the readers for their valuable comments on our study "KTP laser assisted endoscopic tissue fibrin glue biocauterization for congenital pyriform sinus fistula in children" [1]. The authors did propose an uncommon but sometimes happened incidentally clinical conditions, which is congenital pyriform sinus fistula (CPSF) with thyroid cyst. As in a retrospective clinical review of 165 cases by Xian et al. [2], there were only 12 cases presented with cervical cyst, especially in neonates and young infants less than 3 months.

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