Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are increased interstitial markings bilaterally with a more confluent opacity projecting over the right lower lung . Findings are somewhat similar to prior , though it is unclear whether findings resolved in theinterval and reoccurred or have been present throughout . Findings are nonspecific and could be due to infection with mild pulmonary edema , but an atypical infection is also in the differential . No large pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are stable .
    OUTPUT:
    
Increased interstitial markings bilaterally with more confluent area in the right lung base . Findings are similar to prior ; however , it is unclear whether findings may represent chronic pulmonary edema , pneumonia with superimposed pulmonary edema or atypical infection .