Massive Abdominal Distension in a Five-Year-Old Child: Management of a Giant Mesenteric Cyst.

Mesenteric cyst is a rare entity with a very low incidence. The majority of the cases are incidental. Despite several theories, its etiology remains unknown. Some cases present with non-specific symptoms such as pain abdomen, swelling, and abdominal mass. It may rarely get complicated due to hemorrhage, torsion, or rupture of the cyst. Large mesenteric cysts are quite uncommon. However, these cysts seldom grow to produce clinical symptoms arising from compression of adjoining structures, such as vomiting, constipation due to intestinal obstruction, or dyspnoea due to compression of the diaphragm. Despite several theories, its etiology remains unknown. Diagnosis can be achieved with the help of radiological examinations such as ultrasonography (USG), contrast-enhanced computed tomography (CECT), magnetic resonance imaging (MRI), and confirmed by histopathological examination. We report a case of a giant mesenteric cyst in a five-year-old girl.