Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Dual - lead left - sided AICD is again seen with leads extending to the expected positions of the right atrium and right ventricle . No pleural effusion or pneumothorax is seen . Diffusely increased interstitial markings bilaterally , worsened since the prior study , may be due to worsening of chronic interstitial lung disease or acute on chronic process . Slight increase in interstitial markings at the lateral right upper lung may relate to the above process , although atypical infection at this location is not excluded . The cardiac and mediastinal silhouettes are stable and unremarkable . As also noted on the prior study , there is subtle background of increased interstitial markings , which may be due to chronic lung disease .
    OUTPUT:
    
Diffusely increased interstitial markings bilaterally , worsened since the prior study , may be due to worsening of chronic interstitial lung disease or acute on chronic process . Slight increase in interstitial markings at the lateral right upper lung may relate to the above process , although atypical infection at this location is not excluded .