Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Lung volumes are markedly low limiting assessment . The cardiac silhouette appears enlarged which could reflect known prominent epicardial fat pads . In this patient with known interstitial lung disease , there are prominent reticular markings in the periphery of both lungs likely reflecting interval progression in fibrosis . Difficult to exclude a superimposed pneumonia . No large effusion or pneumothorax . No overt edema or congestion . Mediastinal contour is normal . Bony structures appear intact .
    OUTPUT:
    
Pulmonary fibrosis , likely progressed in the interval . Difficult to exclude a superimposed pneumonia .