Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear , well - expanded lungs without pleural effusion or pneumothorax . Cardiac silhouette is normal in size , the mediastinal contours are normal . The pulmonary vasculature is normal . Sclerosis in the left humeral head with a pattern of arcs consistent with a chondroid lesion such as enchondroma . There is no associated soft tissue mass or cortical destruction .
    OUTPUT:
    
1 . No acute chest abnormality . 2 . Chondroid matrix within the left humeral head likely represents a benign entity such as enchondroma . If there is pain referable to this region , this could be better evaluated with MRI to exclude a more aggressive chondroid lesion .