As has been said, papilloma is essentially a warty growth. It shouldn’t effect the quality nor longevity of your chameleon. One of my girls had one last year. It was removed for biopsy and hasn’t grown back. She has a tiny little scar where it was that probably only I can see because I know it’s there. It is viral though, so I am careful to not pass it on to my other chameleons. Washing hands in between handling, using separate items for each and sanitizing shared surfaces, such as my weighing stick are some of the measures I take, which are things that really should be done regardless. The only thing that it’s really effected is I can’t breed her if I wanted.