Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There has been interval improvement in the overall size of left pneumothorax . There has been interval decrease in size of the left apical component -- a small residual left apical component remains visible . The left costophrenic angle component is re-demonstrated , compatible with small residual pneumothorax . The retrosternal / medial component adjacent to the mediastinum is much smaller and less conspicuous , nearly resolved . Hydro pneumothoraces are again seen both anteriorly and posteriorly on the lateral view . There is no evidence of shift of mediastinal structures . A left pigtail catheter is in unchanged position along the left chest wall . Small foci of subcutaneous gas along catheter tract are unchanged . The aerated portions of the left lung and the right lung are grossly clear . There is no pulmonary vascular congestion . Small bilateral pleural effusions are unchanged . There is no right pneumothorax .
    OUTPUT:
    
1 . Interval near - complete resolution of the apical and retrosternal components of the left pneumothorax . Residual left costophrenic angle small hydropneumothorax , possibly loculated . On the lateral view , components are seen both anteriorly and posteriorly . Left pigtail catheter along the left chest wall is in unchanged , grossly appropriate position . 2 . Stable small right pleural effusion .