患儿 ,男 ,3岁。 1 998年 6月 1 6日因咳嗽、呼吸不畅在本院儿科拟“小儿肺炎”治疗好转 ,2 5日出院。 8月 5日因声嘶、呼吸困难收住本科。检查 :吸气性喉鸣 ,三凹征 ,咽充血明显。咽后壁隆起 ,以右侧为著 ,上界至鼻咽后壁下部 ,向下通向喉咽 ,下界不清楚。X线颈正侧位摄片、胸 Children, male, 3 years old. June 1, 1998 June 16 due to cough, poor breathing in our hospital to be pediatric “pneumonia” improved treatment, 25 days discharged. August 5 due to hoarseness, breathing difficulties admitted to the undergraduate. Check: inspiratory throat, three concave sign, pharyngeal congestion was obvious. Pharyngeal posterior wall bulge to the right as the upper bound to the lower part of the nasopharynx, down to the hypopharynx, the lower bound is not clear. X-ray neck is lateral radiography, chest