患儿,男,3.5岁。以“左颈部包块4个月、间断性右外耳道流脓血伴耳廓下红肿3个月”收住院4个月前发现左颈部中、上段有一包块,约核桃大小,无痛,逐渐增大。3个月前无明显诱因右耳流脓,耳廓红肿、疼痛,于当地医院抗炎治疗,10d后流脓停止,肿胀消退。1周前上述症状复发。发病以来,无 Children, male, 3.5 years old. To “left neck mass 4 months, intermittent right ear canal purulent blood with auricle inflamed 3 months” admitted to the hospital 4 months ago found the left neck, the upper section of a mass of about walnut size, no pain , Gradually increased. No obvious incentive 3 months ago Right ear pus, ear swelling, pain, anti-inflammatory treatment in the local hospital, pus stop after 10d, swelling subsided. 1 week ago, the above symptoms recur. Since the onset, no