Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are compared to previous exam from ___ . Again seen is right lower lobe opacity medially . Although somewhat improved from prior , there has been no intervening x-ray documenting resolution . This could be due to scarring , post - treatment changes ; however , superimposed infection is not excluded . Elsewhere , the lungs are clear . There is no significant pleural effusion . The cardiomediastinal silhouette is stable . Vertically oriented surgical chain sutures again noted . Right chest wall port is no longer seen . Osseous and soft tissue structures are unremarkable . The patient is status post gastric pull - up .
    OUTPUT:
    
Persistent right basilar , medial opacity , potentially due to scarring , post - treatment in nature ; however , given acute symptoms superimposed infection is not excluded .