A bronchogenic cyst is regarded as a developmental abnormality of the primitive foregut, which typically occurs in the mediastinum. The cystis normally diagnosed in relation to respiratory problems or recurrent infections in children. In adulthood, it is a rare pathology, and its diagnosis is usually incidental. Moreover, subdiaphragmatic and retroperitoneal locations are exceptionally rare. A 60-year old woman presented with an incidental left retroperitoneal mass that was suspected of being a non-functioning retroperitoneal tumor. After evaluating the general radiologic and endocrinologic work up for a retroperitoneal tumor, a laparoscopically complete resection was performed with primary repair of the attached diaphragm. The surgically resected cyst measured 7×5×5 cm and was filled with mucin material. Histologically, the cyst wall was lined by a ciliated pseudostratified or tall columnar epithelium without dysplastic changes. The diagnosis of a bronchogenic cyst in the retroperitoneum was confirmed. We present this case with a review of the relevant literature.

Keywords: Bronchogenic cyst, Retroperitoneum, Laparoscopy