Introduction: Cystic lymphangiomas are rare, benign, and congenital lesions which result from malformations of the lymphatic system. These malformations occur more frequently in pediatric patients, with diverse clinical symptoms. Imaging studies such as ultrasounds, computed tomography scans, and magnetic resonance imaging (MRI) have proven to be of great use in their diagnosis, and with the surgical removal of the lesion being the treatment of choice. Clinical case: A 4-year-old male with a history of hiporexia and early satiety since he was 2 years old. Furthermore, 72 h before consultation had suffered blunt abdominal trauma, presented tegument paleness and abdominal pain as a result of this trauma. The pain decreased after analgesics. Afterward, there was abdominal distention. We were able to observe a cystic lesion with data gained through an abdominal MRI along with free fluid and active bleeding. During the surgical procedure, a cystic lesion-dependent of the greater omentum is found and verified with a histopathological report. The post-operative evolution of the patient was positive. Conclusion: Abdominal cystic lymphangiomas are rare; the definitive treatment is the removal of the lesion, either with minimally invasive surgery, by laparoscopy or open technique. We ought to have clinical suspicion to offer timely treatment, with the support of imaging studies since clinical presentation varies within the pathology.