Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild blunting of the left costophrenic angle could be due to pleural thickening or small effusion . In addition , on the lateral view there is increased opacity projecting over the posterior costophrenic angles , potentially localizing to the left lower lobe on the frontal view . The lungs are otherwise clear . Cardiac silhouette is top - normal . Proximal right humerus fracture is as seen on recent shoulder x-rays . Compression deformities of several lower thoracic / upper lumbar vertebral bodies are noted . Surgical clips in the right upper quadrant suggest prior cholecystectomy .
    OUTPUT:
    
Blunting of the left lateral costophrenic angle , potentially atelectasis versus pleural scarring . Retrocardiac opacity which could potentially be infection in the proper clinical setting . Proximal right humerus fracture as seen on recent shoulder films . Lower thoracic and upper lumbar compression deformities .