Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a focal opacity at the left mid lung peripherally which corresponds to area of infarction previously seen on study from ___ . No other focal consolidation is identified . There is a small left pleural effusion . Cardiomediastinal silhouette and hilar contours are within normal limits . There is no pneumothorax . Visualized upper abdomen is unremarkable . Osseous structures are grossly intact .
    OUTPUT:
    
1 . Focal opacity at the left mid lung peripherally which corresponds to area of pulmonary infarction seen on previous study . 2 . Small left pleural effusion .