Hemorrhagic lymphangioma mimicking hemoperitoneum: MR imaging diagnosis

Omental cystic lymphangioma is an uncommon malformation that occurs in children. The authors report the magnetic resonance (MR) imaging findings in a case of hemorrhagic cystic abdominal lymphangioma, which clinically mimicked a recurrent hemoperitoneum. They demonstrate the superiority of MR imaging relative to computed tomography and ultrasound in diagnosing large hemorrhagic cystic masses and differentiating them from free intraperitoneal fluid with multi-planar imaging and fluid characterization. This enables precise tumor localization and extension, aiding surgical resection.