Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , right apical pneumothorax remains essentially unchanged . Air is now also seen in the right lower pleural space . The extent of ground - glass opacity in the right lower lung has not significantly changed , likely representative of hemorrhage . There is no mediastinal shift to suggest tension . Cardiomediastinal silhouette is unchanged . A fiducial marker is again seen in the right lower lung .
    OUTPUT:
    
Unchanged right pneumothorax .