Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiographs were provided . There is no focal consolidation , pleural effusion or pneumothorax . Cardiomediastinal silhouette is normal . There is a hyperdense linear - appearing lesion projecting over the left heart border in between the eighth and ninth posterior ribs only seen on the PA view which has been stable since ___ and may be within the chest wall . The osseous structures are otherwise intact .
    OUTPUT:
    
No acute cardiopulmonary process .