RETROPERITONEAL FOREGUT CYST

A foregut cyst is formed as a result of abnormal budding and pinching of the tracheobronchial tree when bronchial buds develop to form the p rimitive respiratory tree. Foregut cysts are clinically classified as bronchogenic, esophageal, enterogastric, or ciliated hepatic. We prese nt a foregut cyst that occurred in the retroperitoneum and was difficu lt to distinguish from other retroperitoneal cystic mass lesions, Magn etic resonance imaging was useful in revealing the cyst's continuity t o adjacent organs.