Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . Left perihilar and left basilar opacities are worsened compared to ___ , though similar to ___ . Extensive right lung opacities are similar to prior , though slightly improved in the right mid-lung region . Known area of cavitation in right upper lobe is present consistent with necrotizing pneumonia . Indistinct vascular markings are suggestive of superimposed pulmonary edema . Blunting of the right costophrenic angle is similar to prior and compatible with a small pleural effusion . No pneumothorax or radiopaque foreign body .
    OUTPUT:
    
Extensive bilateral parenchymal opacities , right greater than left , with apparent worsening of left perihilar and basilar opacities since ___ , though similar to ___ . Findings are compatible with known history of multifocal pneumonia although superimposed edema may be present .