例1,女,44岁,因左侧颈部无痛性包块1年8个月入院。查体见颈部左侧有一鸭蛋大小肿块,边界清楚,上至耳垂,下至锁骨上2横指,肿块左右边缘分别超过胸锁乳突肌前后缘2cm,左右活动,中等硬度,无触痛。在全麻下手术切除,完整剥离瘤体,约7cm×5cm×3cm,包膜完整,有囊性感。病理检查(S-25635),瘤体部分实性,部分囊性,囊内充满混浊液体。镜下见由多边形细胞成巢状和条索状,胞浆较 Example 1, female, 44 years old, due to painless mass in the left neck 1 year and 8 months admitted. Check the body to see the left side of the neck there is a duck size of the tumor, the border is clear, up to the earlobe, down to the clavicle 2 horizontal refers to the tumor around the edge of the sternomastoid mastoid before and after 2cm, activity, moderate hardness, no tenderness . Surgical resection under general anesthesia, complete dissection of the tumor, about 7cm × 5cm × 3cm, complete capsule, a cystic sexy. Pathological examination (S-25635), part of the solid tumor, partially cystic, cystic filled with turbid liquid. Microscopically seen by the polygonal cells nests and cords, cytoplasm more