Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal and hilar contours are within normal limits . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . There is pleural - based density along the left upper lung laterally which may be due to prominent extrapleural fat . A right shoulder arthroplasty is demonstrated . Severe degenerative changes noted at the left shoulder .
    OUTPUT:
    
No acute cardiopulmonary process .