Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are infrahilar interstitial abnormalities , without pleural effusion or pneumothorax . The cardiac silhouette is normal in size , the mediastinal contours are normal . There is mild S - shaped scoliosis of the thoracolumbar spine .
    OUTPUT:
    
Perihilar interstitial abnormality , which could be consistent with pneumocystis jiroveci pneumonia .