Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . There is a dense left basilar opacity silhouetting the hemidiaphragm . Elsewhere the lungs are essentially clear . The cardiomediastinal silhouette has not definitely changed but is obscured at its left margin due to the left basilar opacity . Diffuse sclerotic metastases seen throughout the visualized osseous structures most notably at the right proximal humerus .
    OUTPUT:
    
1 . Left basilar opacity suggestive of an effusion with underlying atelectasis . Infection also possible . 2 . Diffuse sclerotic metastases .