Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient 's condition required examination in sitting semi-upright position using AP frontal and left lateral views . Comparison is made with the next preceding study of ___ . The heart contours remain enlarged and similar . There is again evidence of some mediastinal air along the left lateral cardiac contours . There is no evidence of remaining pneumothorax in the apical area . The loculated hydropneumothorax along the anterior chest wall as identified on the lateral view remains unaltered . No new pulmonary parenchymal abnormalities are identified and the accessible pulmonary vasculature is not more congested than before . Left - sided basal pulmonary pleural densities suggestive of post-operative atelectasis remain unchanged .
    OUTPUT:
    
Loculated post-operative hydropneumothorax along anterior chest wall . No significant interval change during latest day .