Septoplasty and tip work done about 14 months ago. Bossea or scar tissue? (photo)

I had a septoplasty and tip work done about 14 months ago. Everything looked great until November, when a small pea size "lump" was felt and seen (a bit) in the tip of nose. I had many steroid injections, to no avail. Last week, my surgeon made a small incision inside the nostril to cut out scar tissue. Everything was smooth until a week later. I can now feel and see (a little) the lump. He ordered a MRI which found nothing in the cartilage department. Thoughts?