Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Coinciding with interval drainage , the cardiac contour appears decreased although still mildly enlarged . It is partly obscured at the left and inferior portions by confluent left basilar opacification with a substantial pleural effusion , probably again moderate to large , with loculation , but similar to prior findings . Right paramediastinal and left hilar mass effect appears decreased as since the prior radiographs .
    OUTPUT:
    
Persistent confluent left basilar opacification with a left pleural effusion , including some degree of loculation . Decreased cardiac contour .