The latest on my husbands stage 4a lung cancer. When he said that he could not breathe went went to the ER. He was diagnosed with an embolism on the artery leading to his lung. Admitted and the next 7 days went on blood thinner, oxygen, and steroids for continued lung inflammation. He is now home, not being treated for cancer, on 2 liters of 24/7 oxygen. He will have a CT within a few weeks to determine the status of his cancer, blood clots and inflammation. He has great difficulty catching his breath after walking 10-25 steps even with the oxygen.