Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is accentuated by low lung volumes and appears mildly enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged with crowding of the bronchovascular structures due to low lung volumes . Left basilar consolidative opacities concerning for pneumonia . There may be a small left pleural effusion . No pneumothorax is identified . No acute osseous abnormalities detected .
    OUTPUT:
    
Left basilar opacification concerning for pneumonia with small left pleural effusion . Followup radiographs after treatment are recommended to ensure resolution of this finding .