Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A confluent area of opacity involving the majority of the left upper lobe has substantially progressed since ___ and is associated with a mild degree of volume loss . Additionally , a new confluent opacity has developed in the right middle lobe , also associated with some volume loss . Review of the PET - CT of ___ , reveals substantial narrowing of the left upper lobe bronchus , raising concern that the left upper lobe process may be post-obstructive . In the setting of known hilar lymphadenopathy , the right middle lobe process may also be post-obstructive . Cardiac silhouette is stable in size . Hilar structures are difficult to compare to the prior study due to new juxtahilar abnormalities , but there has been apparent interval increase in right hilar lymphadenopathy since the prior radiograph , likely accompanied by subcarinal lymphadenopathy . Known left prevascular lymphadenopathy is seen to better detail on the prior CT / PET , but left internal mammary nodes are evident on the lateral radiograph . There are no pleural effusions . Post-vertebroplasty changes are noted in the lower thoracic and upper lumbar spine .
    OUTPUT:
    
Left upper lobe and right middle lobe opacities which may represent post-obstructive atelectasis / consolidation in the setting of known hilar lymphadenopathy in this patient with lymphoma . Contrast - enhanced CT may be helpful to more fully evaluate the relationship of lymphomatous nodal enlargement to bronchial structures . Findings entered into radiology communications dashboard .