Help with my cat, I would really appreciate it 🙏🏼

CONTEXT: My family and I take care of some stray

cats that live outside our house. Recently we had to put to sleep the sister of the cat I'm asking about now, because she had CCE on her nose and it was too advanced to extract it with surgery. She got positive to leukemia. My vet has a yet to schedule appointment to come to my house and vaccinate all of the stray cats this cat I'm referencing to had contact with.

NOW. As mentioned above the sister of the now diseased cat that had the CCE has a big black ball attached to one of her tooth it looks like a mass. Already texted my vet to ask if it has to do with leukemia too or if it's another possible cause. The female cat is around 8 years old and is sterilized. Since she's not ours we don't know if she has all of her vaccines on or not.

Any help would be appreciated while I wait for my vets response.

It's has been a very stressful week because of the passing of the cat that had CCE. We do our best to take care of the stray cats of our street since my family and I love cats. Any tips or guidance will relieve my pain of thinking this cat I'm asking now would need to be put to sleep too. Thank you