Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac silhouette size appears mildly enlarged . The aortic knob is calcified . Mediastinal and hilar contours are otherwise unremarkable . Lung volumes are slightly low with crowding of bronchovascular structures . Patchy and ill - defined nodular opacities are noted in both perihilar regions with peribronchial cuffing , more pronounced on the left . No pleural effusion or pneumothorax is identified , although the patient 's neck and chin obscure assessment of the medial lung apices . No acute osseous abnormalities detected .
    OUTPUT:
    
Patchy and ill - defined perihilar nodular opacities , more pronounced on the left , worrisome for multifocal pneumonia .