Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Fracture of the left sixth rib is again seen . There is a small residual left apical pneumothorax . Overall , there is minimal change from prior exam . Cardiomediastinal silhouette is stable . No large effusion is seen .
    OUTPUT:
    
Small left pneumothorax , minimally increased from prior exam . Left sixth rib fracture redemonstrated .