Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There are increased interstitial markings throughout . At the lung apices these changes may be chronic however they are now more apparent at the lung bases with associated ___ B - lines , and mild cardiomegaly . Increased opacity at the right lung base may represent atelectasis , but can not completely exclude aspiration or pneumonia in the right clinical setting . The previous seen left lung base nodule is similar or may have possibly increased slightly in size from prior exam . There is small left pleural effusion . There is no pneumothorax . Median sternotomy and mediastinal clips clips are seen . Degenerate changes in the bilateral humeral heads are noted .
    OUTPUT:
    
1 . Increased interstitial markings compatible with chronic underlying parenchymal disease with suspected superimposed mild pulmonary edema . 2 . Increased opacity the right lung base may represent atelectasis , but can not completely exclude aspiration or pneumonia in the right clinical setting . 3 . Previously seen left lung base nodule similar or possibly increased slightly from in size from prior exam .