I'm intrigued by your story. I was diagnosed with COPD at 50. I was a heavy smoker. I quit and went on a desperate "health kick' including weight training yoga and jogging. I was told I wouldn't be able to jog. Initially I struggled to do a .25 mile jog. Eventually (2-3 years later) I got to 10 miles at 12-13 minute pace. Now, at 65 I generally do 5k-10k jogs at 11-12 minute average (I start at 15 minute pace and end at 9)
Sorry for the history, but I'm curious about your distances and speeds and if you know many lung cancer or COPD people who became fit runners. I haven't met any personally.
I believe my strict exercising routine has substantially slowed the disease progression.