Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Primarily involving the medial posterior basilar end superior segments of the left lower lobe is a more extensive consolidation than seen on the prior radiographs with air bronchograms . Areas of new perihilar opacity obscure a mass at the left hilum . Previously noted suspicious lymphadenopathy is not well assessed on radiographs . A nodular focus projecting over the right lower lung suggests a nipple shadow and there is persistent partial right middle lobe atelectasis . There is no definite pleural effusion . A Port - A - Cath terminates at the uppermost part of the right atrium .
    OUTPUT:
    
Increasing perihilar opacities in the left lung . Although aspiration is a consideration , in the setting on a known left hilar mass suspicious for malignancy , post-obstructive pneumonitis could also be considered .