Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , pleural density on the left is somewhat increased and is obliterating the left hemidiaphragm . It is difficult to say if there is overlying pleural effusion or if the lung is being encased by chronic or malignant changes . There is moderate further loss of left - sided lung volumes , although the upper portions of the left lung are aerated . The right lung remains aerated , but there is a small pleural effusion in the right and posterior pleural sinuses .
    OUTPUT:
    
1 . Increased pleural density on the left with interval decrease of left lung volume . 2 . New small right pleural effusion .