Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Retrocardiac opacity is again noted most consistent with left lower lobe consolidation and effusion . Overall , findings appear slightly progressed compared with prior exam . Right lung remains clear . Otherwise no change .
    OUTPUT:
    
Worsening left lower lobe consolidation concerning for worsening pneumonia . Probable small left effusion .