Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a small apical left pneumothorax , similar in degree when compared to the prior study . A left - sided chest drain is in - situ . Nonetheless , there does appear to be residual left pleural fluid . Airspace opacity in the left upper lobe is similar to slightly progressed when compared to the prior study . Nodular opacities throughout both lungs are better visualized on the earlier PET - CT mild cardiomegaly and prominence of the pulmonary vascular this or congestive heart failure .
    OUTPUT:
    
Small left apical pneumothorax , similar in degree when compared the prior study . Persistent left pleural effusion . Mild congestive heart failure .