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Abstract Objectives/Hypothesis Many children with cervicofacial lymphatic malformations have facial skeletal abnormalities. This study qualitatively and quantitatively evaluated these bony mandibular abnormalities. Study Design Retrospective chart review. Methods Patients with craniofacial lymphatic malformations presenting to a vascular anomalies center during a 2-year period were included. An age-matched control population was found on the Picture Archiving and Communication System database. Three-dimensional reconstructions were created from computed tomography and magnetic resonance imaging. Qualitative observations and quantitative measurements were taken of the gonial angle, mandibular anterior dentoalveolar height, and anterior condylar displacement. Results There were 23 controls. A total of 21 patients with''beard''distribution malformations were studied; 10 had unilateral and 11 had …