Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The tracheostomy tube is in appropriate position . There is no radiographic evidence of complications . Mild - to - moderate cardiomegaly is stable compared to the prior exam . There appears to be interval increase in opacification at the left lung base likely secondary to pneumonia . No large pleural effusion is identified . No pneumothorax .
    OUTPUT:
    
Interval increase in consolidation at the left lung base concerning for pneumonia .