Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A large mass is present in the left upper lobe measuring approximately 6 .4 x 7 .1 cm in diameter , and was previously partially obscured by adjacent focus of consolidation . Cardiomediastinal contours are normal . Left hilum is difficult to assess due to obscuration by the adjacent mass . Right lung and pleural surfaces are clear . Left hemidiaphragm is mildly elevated .
    OUTPUT:
    
Large left upper lobe lung mass , highly concerning for primary lung cancer . This may be associated with airway involvement given its proximity to the hilum and the presence of a postobstructive pneumonia on previous imaging of ___ . Findings communicated by telephone with Dr . ___ on ___ at 9 :05 a .m . at the time of discovery with recommendation for repeat chest CT to guide further diagnosis of this presumed lung cancer .