Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a new large masslike density adjacent to the left paramediastinal position involving the left hila and medial portion of the left upper lobe measuring 3 .8 x ___ .6 cm . The remaining lungs are clear . The heart size is normal . No pleural effusion or pneumothorax is present .
    OUTPUT:
    
New large left paramediastinal mass . Differential diagnosis includes pulmonary mass , malignancy , or mediastinal mass . Further evaluation with CT is recommended at the earliest convenience . Telephone notification to Dr . ___ by Dr . ___ at 16 : 18 on ___ .