Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . There is left basilar opacity silhouetting the hemidiaphragm compatible with effusion with possible underlying airspace disease . Given lower lung volumes on the current exam , the lungs elsewhere remain grossly clear . Cardiac silhouette is essentially stable as are the osseous and soft tissue structures .
    OUTPUT:
    
Findings compatible with a new left - sided effusion with possible underlying atelectasis or airspace disease .