Abstract. Bronchogenic cysts are congenital anomalies of the bronchial tree and they are generally asymptomatic, and often incidentally diagnosed. If the bronchogenic cyst is infected or high protein level include, differantial diagnosis should be included lung abscess, hydatid cyst, fungal disease, tuberculosis, infected bullae, vascular malformations, and tumoral conditions. Complete surgical excision as the most reliable therapeutic option due to the risk of development of complications and recurrence, even in incidentally diagnosed cases. Key words: Bronchogenic cyst, child, infected, surgical excision