Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly . Of unknown chronicicty is diffuse heterogeneous airspace opacification throughout both lungs nearly obscures interstitial abnormality and a handful of centimeter or smaller lung nodules , most pronounced in the right midlung . Bilateral pleural effusions are small . There is no pneumothorax . Widening of the mediastinum is also of unknown duration and although it could be due to fat deposition and vascular engorgement could be due to adenopathy as well .
    OUTPUT:
    
1 . Severe , diffuse heterogeneous airspace opacities throughout the lungs could be pneumonia / aspiration or alveolar hemorrhage . Many small lung nodules . 2 . Mild interstitial thickening suggests a component of pulmonary edema . 3 . Small bilateral pleural effusions . 4 . Possible mediastinal adenopathy .