Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is normal . The mediastinal and hilar contours are unremarkable . The pulmonary vascularity is within normal limits . There is streaky opacity in the left lower lobe with a small left pleural effusion noted . The right lung is grossly clear . There is no pneumothorax . No acute osseous abnormality is present .
    OUTPUT:
    
Small left pleural effusion , a component of which is loculated laterally , with adjacent left lower lobe opacity , possibly reflecting pneumonia . Continued followup examinations are recommended to ensure resolution of this finding after treatment .