Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiac , mediastinal and hilar contours are relatively unchanged . Small bilateral pleural effusions appear increased in size compared to the previous exam . Worsening opacification with ill - defined nodularity is noted at both lung bases . There is no pneumothorax . No pulmonary vascular congestion is demonstrated . Clips are seen within the right axillary region , and the patient is status post right mastectomy .
    OUTPUT:
    
Increased size of small bilateral pleural effusions and worsening bibasilar airspace opacities , right greater than left . Findings could reflect pneumonia or aspiration superimposed on a background of lymphangitic spread of tumor , though disease progression is also not excluded .