Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate left and small right pleural effusion , not significantly changed since recent previous exam . Superiorly the lungs are clear without consolidation or edema . The cardiomediastinal silhouette is stable , partially silhouette on the left due to the effusion . No acute osseous abnormalities .
    OUTPUT:
    
Moderate left and small right pleural effusions , similar to recent exam .