Hmmm, I have seen papilloma growths on panther’s in various places. This doesn’t really look like it to me. It looks like the scales are pushed up from the growth. Papilloma typically looks like a wart or kind of like a head of cauliflower. This would be best identified by a vet. If it’s an abscess it would need to be drained. If it’s possibly a papilloma or something else, it would need a biopsy.