Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided dual - chamber pacemaker device is re - demonstrated with leads terminating in the right atrium and right ventricle . Heart size remains mildly enlarged . The mediastinal and hilar contours are unchanged , with fullness of the hila and AP window again suggestive of underlying lymphadenopathy . There appears to be mild pulmonary vascular congestion . Increased interstitial markings are again demonstrated with septal thickening at the periphery of both lung bases , suggestive of either an underlying interstitial lung disease or mild interstitial pulmonary edema , and appear similar compared to the prior exam . No new focal consolidation , pleural effusion or pneumothorax is demonstrated . No acute osseous abnormalities seen .
    OUTPUT:
    
Mild pulmonary vascular congestion . Increased peripheral and basilar interstitial opacities again may reflect mild interstitial pulmonary edema , but raise concern for a chronic interstitial lung disease , and findings appear somewhat similar compared to the prior chest radiograph . Fullness of the hila and AP window are suggestive of lymphadenopathy .