Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs were obtained . There is persistent opacity in the left upper lobe , consistent with known left upper lobe collapse and left upper paramediastinal mass , as well as previous radiation therapy . There is slightly increased left pleural effusion and continued elevation of the left hemidiaphragm . The right lung is fully expanded and clear . The cardiomediastinal silhouette is stable . There is no pneumothorax .
    OUTPUT:
    
1 . Slightly increased left pleural effusion . 2 . Persistent left upper lobe collapse and known left paramediastinal mass with post radiation changes .