Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Enlargement of bilateral hila has mildly progressed compared to the prior study of ___ , suggestive of pulmonary hypertension . CT could be performed for further evaluation , if clinically indicated . There is no suspicious mass , focal consolidation , pleural effusion , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits . Old , well healed left - sided rib fractures and a bone island in the posterior left fifth rib are incidentally noted .
    OUTPUT:
    
1 . Mild progression of bilateral hilar enlargement , suggestive of pulmonary hypertension . CT could be performed for further evaluation , if clinically indicated . 2 . No evidence of acute cardiopulmonary process .