[A retroperitoneal bronchogenic cyst].

Bronchogenic cyst is a rare congenital (developmental) anomaly. It is usually asymptomatic but its enlargement and localization may cause serious symptoms. Exact preoperative diagnosis is rarely established. As a rule, it is established during histological examination of the resected specimen. We present a patient with a subdiaphragmatic retroperitoneal bronchogenic cyst in whom exact diagnosis was documented by histological examination of excised cyst. To our knowledge this is the third such case ever reported.