患女,19岁,学生,出生后其颈前左侧即有一黄豆大小包块,无任何不适。随年龄增长,包块逐渐增大,无感染史。1年前曾在外院行激光治疗,当时包块破溃,有软骨样物掉出,数日后溃烂处皮肤愈合。半年前包块再次出现,并较前增大。拟诊“第Ⅱ鳃裂瘘”收入院。查体可见颈前偏左胸锁乳突肌中下1/3处可见一包块,约1cm×1cm大小, The girl, 19 years old, was born with a soy-sized mass on the left side of her neck and no discomfort. With age, masses gradually increased and there was no history of infection. One year ago, he was treated with laser in an external hospital. At that time, the mass was ulcerated and cartilage-like material fell out. The skin healed several days later. Six months ago, the masses reappeared and increased. It is intended to diagnose the “second-division spar” income hospital. Examination revealed a mass of 1 cm x 1 cm in the lower 1/3 of the left sternocleidomastoid muscle.