Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The right chest Port - A - Cath terminates in low SVC . Lung volumes low . Opacity left lung base obscures hemidiaphragm in overlies the spine on lateral view . Mediastinal contours hila , cardiac silhouette are normal . A small left pleural effusion is stable from ___ .
    OUTPUT:
    
Left lower lobe opacity likely due to combination of pneumonia , atelectasis , and pleural effusion .