Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded without evidence focal consolidation . Left midlung density is unchanged . Mediastinal contours , cardiac borders , and hila are normal . No pleural effusions .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Left mid lung density unchanged since ___ . If clinical concern for malignancy , a CT could be obtained for further evaluation .