鳃裂囊肿属于鳃裂畸形之一种。第二鳃裂囊肿常位于颈上部，大多在舌骨水平．胸锁乳突肌上1／3前缘附近，继发感染后，可骤然增大，伴疼痛，并放射至腮腺区。我科遇一患者鳃裂囊肿继发感染误诊为颈部化脓性淋巴结炎，现报告如下。患者，女，26岁，主因右颈部肿物20年，反复肿痛1 Gill cleft cyst belongs to one of the cleft branchial gills. Second branchial cleft cyst often located in the upper part of the neck, mostly in the hyoid level. The sternocleidomastoid muscle around the 1/3 front, secondary infection, can be suddenly increased, with pain, and radiation to the parotid gland area. I encountered a patient in case of secondary infection of the branchial cleft cyst with misdiagnosed neck purulent lymphadenitis, are as follows. Patients, female, 26 years old, mainly due to the right neck mass 20 years, repeated swelling and pain 1