Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to large left - sided pleural effusion with left upper lobe mass and coarse reticular opacities throughout the left lung are known lung cancer and likely lymphangitic carcinomatosis . Right lower lobe coarse reticular opacities . No pneumothorax .
    OUTPUT:
    
Moderate to large left effusion with known left lung cancer and lymphangitic spread .