Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lungs are overinflated , with flattening of the diaphragms and widening of the retrosternal clear space . There is an approximately 6 - cm mass in the left posterior perihilar region , which appears to span the posterior segment of the left upper lobe and superior segment of the left lower lobe , with surrounding spiculation and architectural distortion . Right lung is well expanded and clear . Heart size is top normal . There are no pleural effusions or pneumothorax . Multilevel bridging osteophytes in the thoracic spine , with age - indeterminate compression deformity in a mid-thoracic vertebra .
    OUTPUT:
    
Large left perihilar mass . Recommend chest CT for further evaluation .