Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is complete opacification of the right lower lung zone projecting over the cardiac silhouette on lateral view and expanding the fissures . There is no pleural effusion or pneumothorax . There is widening of the a right peritracheal stripe , likely secondary to lymphadenopathy . Cardiomediastinal silhouette is stable .
    OUTPUT:
    
Right middle lobe pneumonia and collapse , persistent since ___ , concerning for a postobstructive process . .