Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Relative increased density of the left lung base is unchanged compared to multiple prior examinations and likely reflects chronic pleural thickening . Lungs are otherwise clear without confluent consolidation . There is no pulmonary edema or large pleural effusions . There is no pneumothorax . Mediastinal and hilar contours are within normal limits . Moderate cardiomegaly appears unchanged .
    OUTPUT:
    
Unchanged moderate cardiomegaly . No superimposed acute process .