Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No pneumothorax or pleural effusion . Vague opacity in the left upper lobe , at the site of biopsy , likely reflects hemorrhage . The lungs are otherwise clear . The cardiomediastinal contours are unremarkable .
    OUTPUT:
    
No pneumothorax post biopsy . Mild post biopsy hemorrhage .