A case of air collection in the intrathoracic extrapleural space and pneumothorax during glucocorticoid therapy

Key Figure.(A) Coronal section of chest computed tomography (CT) on day 33 of hospitalization demonstrates an abnormal left-sided air collection with visible fascial webs adjacent to the chest wall (red arrowheads).(B) Horizontal section of chest CT on day 33 revealing reticulated and linear structures in the extrapleural space.The border between the left lung field and the air collection appears rougher (red arrows) compared with the smoother visceral pleural line in the right-sided pneumothorax (green arrows).