Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal with mild tortuosity of the thoracic aorta . Hilar contours are unremarkable . Lungs are again hyperinflated with flattening of the diaphragm , but otherwise clear . Pleural surfaces are clear without effusion or pneumothorax . If a large , centrally umbilicated soft tissue density projecting over the left axilla is n't an external artifact it is a large , ulcerated lestion in the left chest wall , presumably abscess or traumatic .
    OUTPUT:
    
No acute cardiopulmonary abnormality . Hyperinflation suggestive of COPD . Possible large left chest wall lesion , easily evaluated clinically .