Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is diminished lung volume bilaterally however lungs appear clear with no focal consolidation , pleural effusion or evidence of pneumothorax . There has been removal of a previously seen Hickman catheter . A large hiatal hernia is again noted . Cardiomediastinal silhouette and pleural surfaces are unremarkable .
    OUTPUT:
    
No evidence of infection or malignancy .