Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Comparison to ___ . Unchanged position of the left pigtail catheter . There is minimal decrease in the air component in the basal portion of loculated left - sided hydro pneumothorax . Moderate cardiomegaly with partial left lower lobe collapse persists . No evidence of tension . Unchanged normal appearance of the right lung .
    OUTPUT:
    
Mild interval change of loculated left hydro pneumothorax .