Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there has been slight re-accumulation of left pleural effusion . Heterogeneous opacification in the left mid lung has also increased and may represent developing pneumonia . Mediastinal shift to the right and chronic right lower and middle lobe collapse is long - standing . Endotracheal tube , nasogastric tube , and right PICC are in standard position .
    OUTPUT:
    
Mild interval increase in left pleural effusion . Increased heterogeneous opacity in the left midlung may represent developing pneumonia .