| bronchogenic cyst |
a spherical congenital cyst arising from anomalous budding during the formation of the tracheobronchial tree; it is usually found in the mediastinum or the lung and is lined with bronchial epithelium that may contain secretory elements. It may contain air, and if it communicates with the trachea or a bronchus it may periodically evacuate fluid contents into the air passages, resulting in attacks of voluminous expectoration. Infection leads to mediastinal or pulmonary abscess. ...
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