Vallecular cyst is a rare cause of inspiratory stridor in neonates. We report the largest single-center series in the literature of vallecular cyst in infants. All of the ten infants (B.W. 2100-4020 gm, G.A. 33-40 wks) were diagnosed by flexible bronchoscopy and/or computed tomography, over a three-year period from 1994 to 1996. The sex ratio of male to female is 5:5. The onset of illness ranges from 7 day to 1 month. The size by CT scan ranged from 0.5 × 0.5 to 1.5 × 0.7cm. Table

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Nine patients received marsupialization or de-rooling procedure using a carbon dioxide laser without recurrence. Histop\athology of the specimens showed squamous epithelium containing mucous glands in wall of the cyst. Most of the symptomsand signs improved postoperatively. Significantly rapid weight gaining was observed following surgery.