Bronchogenic cysts are congenital lesions usually observed in the mediastinum, near the tracheal carina and middle mediastinum. Herein, we present an exceedingly rare case of intradiaphragmatic bronchogenic cyst with an infectious complication in a 52-year-old man. Chest CT and three-dimensional volume rendered reconstructed images revealed an oval, cystic mass with multiple nodular calcifications, centered in the left diaphragm crus. CT facilitated documentation of the healing process of this rare entity, revealing decrease in size and increase in internal density.
