Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are stable . There is a very small left apical pneumothorax . The right lung is grossly clear with no focal consolidation or effusion identified on the right . A small pleural effusion persists at the left base and is minimally decreased in size from the prior examination on ___ . A chest tube projects over the left costophrenic angle .
    OUTPUT:
    
Small left effusion is minimally decreased in size from the prior examination . Very small left apical pneumothorax .