Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright view of the chest . A right chest wall Port - A - Cath is again seen . Posterior thoracic spinal hardware with skin ___ again noted . There is improved aeration in the right lower lung . There is increased opacity in the left lower lung likely representing a combination of atelectasis and effusion . However , pneumonia difficult to exclude in the correct clinical setting . There is no edema though the hila appear slightly engorged . No pneumothorax . Cardiomediastinal silhouette grossly unchanged .
    OUTPUT:
    
Increased left basal opacity likely represents a combination of atelectasis and effusion , difficult to exclude a component of pneumonia . Possible mild hilar congestion .