Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is chronic pleural thickening at the right lateral lung base . The lungs are otherwise clear . Heart is top - normal in size . Mediastinal contour is unremarkable . No pneumothorax . No convincing signs of pneumonia . Bony structures are intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Top normal heart size . Chronic pleural thickening at the lateral right lung base .