Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild left pleural effusion , it has increased since ___ . Left basilar opacity , likely atelectasis . There is tiny left pneumothorax , not seen previously . Right lung is clear . Shallow inspiration accentuates heart size .
    OUTPUT:
    
Tiny left pneumothorax , not seen previously . Left pleural effusion has increased . Left basilar atelectasis , similar .