Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP chest radiograph demonstrates a left chest tube has been inserted and terminates in standard position . The left pleural effusion has resolved . The cardiomediastinal silhouette is stable . Median sternotomy wires are again noted . Subtle lucency along the left hemidiaphragm raises question of possible pneumothorax .
    OUTPUT:
    
Resolved left pleural effusion with chest tube in place . Possible tiny left pneumothorax .