Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are normal . There is a moderate left sided pneumothorax , new from the prior radiographs on ___ without significant right - sided mediastinal shift . The lungs are otherwise clear without effusion or focal consolidation .
    OUTPUT:
    
Moderate left pneumothorax without significant rightward mediastinal shift .