Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no evidence of focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The left hilum is noted to be mildly enlarged . The cardiomediastinal silhouette is within normal limits .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary process . 2 . Mild asymmetrical enlargement of the left hilum . Recommend comparison with prior examinations . If unavailable , recommend 3 month radiographic follow up .