Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lateral left base opacity at the costophrenic angle has been seen over multiple prior studies which may be due to underlying scarring the , however , the opacity appears slightly prominent for the prior study indicates the small focus of infection is not excluded . No large pleural effusion is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are stable . Mitral anulus calcification is again seen . The known punctate left upper lobe calcified granulomas are again seen . Compression deformities and kyphosis of the thoracic spine are again seen and stable .
    OUTPUT:
    
Lateral left base opacity appears increased as compared to the prior study concerning for small focus of infection .