患儿,女,3岁。因发现颈前肿物7个月余伴疼痛4d入院。8个月前患儿无明显诱因发现其颈前正中有一约0.5cm×0.5cm×1.0cm肿物,质软,无红肿、热痛,无呼吸、吞咽和声嘶、发声不适,肿物大小时有改变,有反复感冒史。4d前肿物明显增大,伴疼痛、红肿、发热,收治入院。体检:颈前正中约舌 Children, female, 3 years old. 7 days after the discovery of cervical anterior mass with pain 4d admission. 8 months ago, there was no obvious incentive in children found that there is a middle of the anterior cervical about 0.5cm × 0.5cm × 1.0cm tumor, soft, no redness, heat pain, no breathing, swallowing and hoarseness, sound discomfort, large tumor Hours have changed, there is a history of repeated cold. 4d before the tumor was significantly increased, with pain, swelling, fever, admitted to hospital. Physical examination: the middle of the neck about the tongue