Pictures of Abscess vs Tumors

[Pearl Hamletry]

Hello There hamster friends!

I have a hamster that I inherited through an unwilling rescue donation and the poor lil girl has something wrong with her. I will post pictures later on this evening and I plan on taking her to a vet.

Under her left armpit area it is blackish in color and looks like there is blood under the skin, she has no appearance of a lump and is very happy and doesn't seem to be in pain. I was wondering if any of you have pictures or abscess and/or tumors that I could look at as a frame of reference?

I know it's difficult to take picture of our lil babies that are not doing well but sometime they end up helping other hamsters. So any pictures are appreciated!