Retroperitoneal cystic lymphangioma is a rare benign tumor of the retroperitoneal lymphatics that usually manifests in infancy. If surgical excision is used in treatment, it needs to be as complete as possible to reduce the risk of recurrence. Two pediatric patients, an 18-month-old girl and a 4-yearold boy, underwent laparoscopic excision of symptomatic retroperitoneal cystic lymphangiomas. Macroscopically, the resection was complete in both cases. The postoperative course in both cases was uneventful. Both children remained asymptomatic and no recurrence was observed at 18-month follow-up. Complete laparoscopic excision should be considered as a therapeutic option to treat retroperitoneal cystic lymphangioma.