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 in the mid - to - lower lung fields bilaterally , which could relate to fluid overload , although given question of pneumonia , a superimposed infectious process can not be excluded . No pleural effusion or pneumothorax is seen . The cardiac and mediastinal silhouettes are unremarkable .
    OUTPUT:
    
Increased interstitial markings bilaterally in mid to lower lung fields could relate to fluid overload , although given question of pneumonia , infectious process is not excluded .