Q. A 50-year-old male presents to the clinic with his wife due to shortness of breath that has progressively worsened over the last 3 months. The patient’s wife states that he does not have an appetite and has lost a considerable amount of weight. Past medical history is significant for peptic ulcer disease a few years ago, which was treated with antacids. Family history is unremarkable. The patient is now a retired plumber after having to close his business during the pandemic. He has a 20-pack year smoking history and does not consume alcohol. On examination, there clucking of the patient’s fingernails are noticed and end inspiratory crackles are heard on auscultation. Chest x-ray shows atelectasis in addition to pleural plaques on both sides over the diaphragm. CT shows bilateral basal reticular opacities and a 5 cm cavitary mass in the right lower lung. What is the most likely diagnosis?