Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal views of the chest were obtained . Right pleural effusion has increased in size , now large , with underlying consolidation , compatible with left middle and lower lobe collapse on ___ chest CT . A superimposed process can not be excluded . Left lung appears essentially clear . No pneumothorax . Sternotomy wires appear intact . Wires of left chest wall pacer terminate in similar position to prior . Mitral valve prosthesis is similar to prior .
    OUTPUT:
    
Increased right pleural effusion , now large , with underlying consolidation , compatible with right middle and lower lobe collapse . Superimposed infection may be present .