Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An ill - defined opacity is seen in the right perihilar region , with associated elevation of the right hemidiaphragm and a small right - sided pleural effusion . Right basilar patchy opacity is identified . Otherwise , the left lung is well expanded without focal opacities . There is no left - sided pleural effusion . Cardiac size is normal . Thickening of the right paratracheal stripe likely indicates mediastinal lymphadenopathy . No pneumothorax is identified .
    OUTPUT:
    
Right perihilar opacity likely reflects known malignancy , with small right pleural effusion . Right basilar patchy opacity could reflect atelectasis or infection . Widened right paratracheal stripe suggests lymphadenopathy . Comparison with prior imaging exams are recommended to assess for interval change .