Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Opacification of the mid and lower left lung is grossly unchanged from the prior study and better characterized by same day chest CT . Opacity likely represents a combination of lymphangitic carcinomatosis and a small pleural effusion . Superimposed infectious process in the left lung base is possible in the proper clinical setting . The right lung is clear . There is no pneumothorax . The osseous structures are notable for cervical spinal fusion hardware . The upper abdomen is unremarkable .
    OUTPUT:
    
Short interval stability of mid and lower left lung opacification related to lymphangitic carcinomatosis and a small pleural effusion . Superimposed infectious process is possible in the proper clinical setting .