A 70-year-old man with a history of emphysema and progressive dyspnea is admitted with mild hemoptysis. On exam, he is afebrile; he has a left-sided chest wall scar from a previous thoracotomy with decreased breath sounds in the left lung field. There are wheezes and rhonchi heard in the right lung field. The CXR is shown in . Based on the CXR and clinical history, the most likely diagnosis is