Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph was provided . There is pleural effusion with associated lower lobe opacity , likely representing atelectasis or pneumonia . The right lung remains clear . The cardiomediastinal silhouette appears grossly stable , though suboptimally assessed on this AP portable radiograph . The bony structures are intact .
    OUTPUT:
    
Persistent left effusion with left basal consolidation which could represent atelectasis or pneumonia . Limited exam due to rotation and portable technique .