鳃原性囊肿(淋巴上皮囊肿)在颈侧分上、中、下三组,上组最少见。现报告1例如下。患者王×,男,53岁。一年前偶然发现左耳下一肿物,微痛,未经治疗。半年后肿物逐渐增大,有膨胀感。两侧颌面部不对称,左腮腺区肿物约5×5cm Gill primordial cyst (lymphoepithelial cyst) points in the neck side, middle and lower three groups, the group seen the least. One report is as follows. Patient Wang ×, male, 53 years old. A year ago, I accidentally found a left ear tumor, a little pain, untreated. Six months after the gradual enlargement of the tumor, a sense of expansion. Maxillofacial asymmetry on both sides of the left parotid gland tumor about 5 × 5cm