Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are diffuse predominantly perihilar airspace opacities with slightly nodular appearance , which are new from prior studies . Superimposed hilar adenopathy is difficult to exclude . No pleural effusion or pneumothorax is seen . The cardiomediastinal contours are within normal limits . No acute osseous abnormality is detected .
    OUTPUT:
    
Diffuse perihilar opacities raise concren for widespread pneumonia , superimposed pulmonary edema may be present . Differential diagnosis includes atypical pneumonia and Pneumocystis jiroveci pneumonia . ? immune status of patient