Retroperitoneal multilocular bronchogenic cyst adjacent to adrenal gland

Bronchogenic cysts are generally found in the mediastinum, particularly pos terior to the carina, but they rarely occur in such unusual sites as the sk in, subcutaneous tissue, pericardium, and even the retroperitoneum. A 30-ye ar-old Korean man underwent surgery to remove a cystic adrenal mass inciden tally discovered during routine physical checkup. At surgery, it proved to be a multilocular cyst located in the retroperitoneum adjacent to the left adrenal gland. Microscopically, the cyst was lined by respiratory epitheliu m over connective tissue with submucous glands, cartilage and smooth muscle , thereby histologically confirming bronchogenic cyst. This is the first re ported case of retroperitoneal bronchogenic cyst in an adult without other congenital anomalies in Korea.