Simon, i saw pictures of my insides after a major surgery to remove tumors on the outside of my uterus (benign).. they did a laparoscopy 10 days later, and it looked like a haunted house, there were so many little cobwebs! My surgeon told me it was all scar tissue, and it was growing very fast... nothing to worry about unless it causes adhesions later in my life.
During my first poke and peek after I had a very large TaG1 tumor removed from my bladder, there it was again - inside my bladder this time! This doctor also remarked that I had alot of scar tissue, and he remarked that it would only be a problem if I had to have repeated TURBS for the rest of my life (I'm only 48), or if it grew over the ureter opening; then they'd have to cut it out. Fortunately, I haven't had a recurrence of the BC in the first 15 months.
So I hope your cobwebs are just scar tissue, too
Best of luck to you. Stay strong, remain fearless!
Lauren