囊性淋巴管瘤又称囊性水瘤,是淋巴系统胚胎期发育不良引起的良性肿瘤。本文报道了4例患者,年龄为2～20岁,分别因颈后下三角区、颈前侧区和乳突下区出现无痛性肿块而入院。肿块呈圆形、卵圆形或分叶状,直径3～10cm。3例为囊性,1例为实质性,似脂肪瘤。4例均 Cystic lymphangioma, also known as cystic fluidoma, is a benign tumor caused by the dysplasia of the lymphatic system. This article reported four patients, aged 2 to 20 years old, admitted to hospital because of painless masses in the posterior triangle of the neck, the anterior cervical region, and the submandibular region. The lumps are round, oval or lobulated and 3 to 10 cm in diameter. 3 cases were cystic, 1 case was substantial, like lipoma. 4 cases