Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well inflated and clear . The cardiomediastinal silhouette and hilar contours are normal . There is no pleural effusion or pneumothorax . No definite rib fracture is identified . There is no free air under the diaphragm . A sclerotic lesion is seen at the left humerus , partially visualized and likely represents an enchondroma .
    OUTPUT:
    
No acute cardiopulmonary process . No definite rib fracture seen . Dedicated rib series may be performed if indicated .