Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left upper lobe known mass measures 3 .1 x 5 .3 cm . There is no pneumothorax or pleural effusion . Pulmonary edema is mild . Mediastinal and cardiac contours are normal .
    OUTPUT:
    
1 . There is no pneumothorax post - transbronchial biopsy of left upper lobe mass . 2 . Volume overload , but is mild .