Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is moderate to severely enlarged . Aortic knob is calcified . Mediastinal and hilar contours are relatively unremarkable . Increased interstitial markings bilaterally which appear slightly more pronounced along the periphery may suggest a chronic interstitial lung disease although a superimposed mild interstitial pulmonary edema may be present . No focal consolidation , pleural effusion or pneumothorax is seen . Right apical pleural thickening is noted .
    OUTPUT:
    
Increased interstitial markings bilaterally which appear more pronounced peripherally may suggest an underlying chronic interstitial lung disease , although mild interstitial pulmonary edema is not excluded .