Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In comparison to previous studies there is prominence of interstitial lung markings consistent with known interstitial lung disease which is relatively stable told given the extent of interstitial lung disease would make it difficult to exclude a superimposed pneumonia . The cardiomediastinal silhouette is unchanged compared to previous studies . There is no pneumothorax or pleural effusions . Tracheostomy is midline and unchanged position .
    OUTPUT:
    
Grossly stable interstitial lung disease though difficult to exclude superimposed pneumonia in the right clinical setting .