Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is an ill - defined left basilar opacity , which is nonspecific . There is no pulmonary edema . There are small bilateral layering pleural effusions , as well as a small - to - moderate amount of fluid along the right major fissure . The mediastinal contours are normal . The heart size is mildly enlarged , and similar to the prior exam .
    OUTPUT:
    
1 . Left basilar opacity , which could be atelectasis , though in the proper clinical setting , pneumonia is a consideration . 2 . Small bilateral pleural effusions and fluid layering along the right major fissure .