Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the interim since ___ the distribution of a moderate left pleural effusion has changed in distribution but not appreciably in volume . Small right pleural effusion is smaller . Left lower lobe is probably collapsed , as before . Aside from chronic , mild pulmonary vascular congestion , lungs are otherwise clear . Severe rotatory scoliosis of thoracic spine is longstanding . Cardiac silhouette is difficult to assess given the left pleural abnormality and scoliosis , but neither grossly enlarged nor changed . Marked aortic knob calcification is a normal change of aging .
    OUTPUT:
    
Bilateral pleural effusions , moderate left unchanged , small right slightly improved . Probable left lower lobe collapse , persistent . Mild , chronic pulmonary vascular congestion , but no edema .