Clinical Presentation

A child with a large, soft, right-sided abdominal mass.

Post-contrast abdominal computed tomography (CT) image demonstrates a large, well-circumscribed, predominately fluid-density, multi-septate abdominal mass (arrow) displacing viscera to the left.

Differential Diagnosis

• Lymphatic malformation: The CT appearance in this case is typical of a lymph-containing, multicystic lesion.

• Abscess: