Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is at the upper limits of normal size . The mediastinal and hilar contours appear within normal limits . The lungs appear clear . There is a suspected trace pleural effusion on the left , but probably not on the right . There is no pneumothorax . A surgical clip projects along the right upper quadrant of the abdomen . Small osteophytes are present along the mid - to - lower thoracic spine .
    OUTPUT:
    
Possible trace left - sided pleural effusion , but no evidence of pneumonia .