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. 2016 May 13;150(4):945–965. doi: 10.1016/j.chest.2016.04.026

Figure 17.

Figure 17

Bronchogenic cyst. Usually asymptomatic, these cysts arise from abnormal budding of the tracheobronchial tree. Rarely, they may communicate with the tracheobronchial tree and become infected. An air-fluid level is seen in this large bronchogenic cyst.