Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increase in prominence of chronic interstitial markings suggest progression of chronic interstitial lung disease ; superimposed infectious process or subtle pulmonary edema are not excluded . No pleural effusion is seen . There is no pneumothorax . The cardiac and mediastinal silhouettes are grossly stable . The bones remain diffusely osteopenic .
    OUTPUT:
    
Increase in prominence of chronic interstitial markings suggests progression of chronic interstitial lung disease ; superimposed infectious process or subtle pulmonary edema are not excluded .