2. Methods
A retrospective chart review was performed at a single quaternary institution. Patients with a diagnosis of intra-abdominal vascular malformation treated at Cincinnati Children’s Hospital Medical Center Hemangioma and Vascular Malformations Center between January 2000 and December 2019 were included. Patients with an initial diagnosis of non-solid organ intra-abdominal lymphatic malformation were included. Isolated solid organ malformations such as those patients with pancreatic, splenic, liver, or bowel were excluded for the purposes of this study. Data was collected on demographics, presentation, treatment and outcomes, and follow-up.