Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP single view of the chest has been obtained with patient in upright position . Comparison is made with the next preceding AP single view chest examination of ___ . Status post sternotomy and right - sided PICC line as before . During the latest one - day examination interval , thoracocentesis has been performed on the left side with marked reduction of the pleural density . On the frontal AP view , one can now identify the diaphragmatic contours again and only mild blunting of the left lateral pleural sinus remains . The left - sided pulmonary vasculature is unremarkable and there is no pneumothorax in the apical area . In comparison with the next previous examination , a mild thickening of the apical pleura existed already at that time .
    OUTPUT:
    
Stable chest findings , no evidence of pneumothorax following successful thoracocentesis .