Bump on cat

[wrs2]

I found this bump on my cat, I am going to take her to the vets because of it, but does anyone have any idea of what it could be?
I first noticed it a few weeks back, I don't think it has grown much, maybe a little. The color is gray because she is a calico and has gray skin in that area.

I just get very paranoid about my cats getting sick, so if it looks like nothing major, like a wart maybe, please let me know. Even if it looks ugly and cancerous, please let me know as well!

It's a uniform shape, but looks a bit crusty. But doesn't always feel crusty.
Her and her sister have a lot of dermatological issues, lipomas and cysts.

 

[corvidae]

I'm not a vet so of course can't provide a clear diagnosis, but it reminds me a lot of the lumps and bumps elderly dogs I've known have developed in their old age. Worth getting checked out, but may just be part of the aging process if your cat is older!

 

[wrs2]

She's 16, so she is quite old. You would never know it though lol. She also has a lot of acne under her chin, so again, a dermatologic issue.