Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate right apical pneumothorax is stable . Pleural catheter at the right lung base is unchanged in position . The residual right base atelectasis and small pleural effusion are stable . Cardiac , hilar , and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Stable moderate right apical pneumothorax .