Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are slightly low , unchanged . Increased opacity in the left lower lobe since ___is best appreciated on the lateral view and may reflect atelectasis with slight persistent elevation of the left hemidiaphragm or pneumonia in the appropriate clinical situation . No pneumothorax or pleural effusion . The heart remains enlarged , similar to the prior exam with notable left atrial enlargement . The descending thoracic aorta is tortuous . Prominence of the left upper mediastinum with displacement to the right of the trachea and mild narrowing of the trachea is unchanged and compatible with known goiter better appreciated on the prior CT Chest . Degenerative changes in the shoulders are similar . Mild dextroconvex scoliosis of the thoracic spine with associated distortion of the chest cage are similar . There is eventration of the left hemidiaphragm .
    OUTPUT:
    
1 . Interval increased left lower lobe opacity could reflect atelectasis or pneumonia in the appropriate clinical situation . 2 . Persistent cardiomegaly . 3 . Unchanged appearance of the left upper mediastinum secondary to goiter best appreciated on prior CT .