Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , with crowding of bronchovascular markings , but no focal consolidation . Heart size is normal . There is borderline central venous congestion . Prominence of the superior mediastinum corresponds to lipomatosis on CT . No pleural effusions or pneumothorax .
    OUTPUT:
    
Borderline venous congestion .