Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiographs were obtained . Lung volumes are low , accentuating the lung markings . Cardiac silhouette size is accentuated by low lung volumes , but likely is within normal limits . Mediastinal and hilar contours are unremarkable . No pleural effusion or pneumothorax is detected . No displaced rib fracture is present . Comminuted left humeral head and neck fracture is better visualized on concurrently obtained shoulder radiographs . Diffuse vertebral osteopenia and vetebral compression deformities are unchanged .
    OUTPUT:
    
1 . Low lung volumes . 2 . Comminuted left humeral head and neck fracture . 3 . No displaced rib fractures identified . If there is continued concern , a dedicated rib series is recommended . 4 . Chronic thoracic vertebral compression deformities .