Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Patient has a history of prior right lower lobectomy . There is volume loss in the right lung with opacity at the right lung base which has been previously characterized on prior chest CT with regards to known necrotic tumor . The relative prominence of the right pulmonary hilum is essentially stable from prior exam reflecting tumor involvement . The left lung is clear . Heart size is difficult to characterize due to effacement of the right heart border . The mediastinum appears stable . Bony structures appear stable with a mid thoracic compression deformity again noted .
    OUTPUT:
    
Stable appearance of the chest with volume loss in the right lower lung secondary to prior right lower lobectomy with stable opacity characterized previously as necrotic tumor . No evidence of superimposed pneumonia .