Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a moderate to large left pleural effusion with overlying atelectasis . Rounded right perihilar opacity may projecting anteriorly to the right hilum on the lateral view , raising concern for underlying pulmonary nodule . No right pleural effusion is seen . There is no evidence of pneumothorax . The cardiac silhouette is grossly stable in size . Mediastinal contours are unremarkable .
    OUTPUT:
    
Moderate to large left pleural effusion with overlying atelectasis . Rounded right perihilar opacity appears to project anteriorly on the lateral view , raising concern for pulmonary nodule / mass . Recommend further evaluation with non emergent chest CT .