Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Previously seen right PICC is no longer visualized . There is new small patchy opacity at the left lower lung laterally , not seen clearly on the previous exam . Elsewhere , the lungs are grossly clear . There is no overt pulmonary edema . There is , however , enlargement of the cardiac silhouette , suggesting mild cardiomegaly . No acute osseous abnormality is identified .
    OUTPUT:
    
Patchy opacity in the left lung laterally , potentially atelectasis , although infection could be considered in the proper clinical setting . Mild cardiomegaly .