Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is mild cardiomegaly . The mediastinal and hilar contours are normal . There may be a small left pleural effusion . Linear density projecting over the left apex may be concerning for pneumothorax , but was clearly present on the prior study in ___ . There are expected post - biopsy changes including increased interstitial markings in the left lung field , which may be due to residual edema . Left upper lobe opacity remains , slightly denser and larger with more ill - defined borders than prior , which may be due to minimal hemorrhage post - biopsy .
    OUTPUT:
    
No pneumothorax with expected post - biopsy changes .