Fig. 1. Bronchogenic cyst in an intradiaphragmatic location in a 52-year-old man with dyspnea. A. Chest CT shows an about 10 × 9.8 × 10.8 cm sized, oval.

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 Lungs: o WW 1000 to 1500HU o WL -600 to -700HU  Mediastinum, Hilum: o WW 350 to 500HU o WL 30 to 50HU.

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Fig. 1. Bronchogenic cyst in an intradiaphragmatic location in a 52-year-old man with dyspnea. A. Chest CT shows an about 10 × 9.8 × 10.8 cm sized, oval mass across the left pleural cavity and left retroperitoneum on the axial and coronal reformatted images (white arrows). It has well defined margins and low attenuation of 18–21 Hounsfield unit, which suggests a cystic lesion. The center of the mass is in the left diaphragmatic crus. Contrast enhanced CT reveals peripheral enhancement and multiple enhancing inner septations (arrowheads, left lower and right lower). In the lower portion of the mass, multiple nodular calcifications are seen (black arrow, right upper). There are also pleural effusion and passive atelectasis. B. On chest CT acquired at another facility approximately 2 years previously, a smooth margined, elliptical and heterogeneous density mass is seen in left diaphragmatic crus (white arrows). Multiple nodular calcifications are seen in the mass (black arrow, right panel). Fig. 1. Bronchogenic cyst in an intradiaphragmatic location in a 52-year-old man with dyspnea. A. Chest CT shows an about 10 × 9.8 × 10.8 cm sized, oval mass across the left pleural cavity and left retroperitoneum on the axial and coronal reformatted images (white arrows). It has well defined margins and low attenuation of 18–21 Hounsfield unit, which… J Korean Soc Radiol. 2018 Oct;79(4):227-232. https://doi.org/10.3348/jksr.2018.79.4.227