Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: When compared to multiple priors , there has been no significant interval change . Increased interstitial markings throughout the lungs are seen bilaterally . There is however now increased thickening along the major fissure seen on the lateral view . There is no new focal consolidation . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Besides increased thickening along the fissure , there has been significant interval change . Persistently increased interstitial markings suggesting chronic underlying process without superimposed acute consolidation .