Oh! I am so sorry to see this. I was really hoping that the vet could have just done an amputation to prevent her hurting the leg any further. Many hammies do well on 3 legs and she had been getting along somewhat well. How sad that she has a mass too. I don't blame you for making that decision. I would have done the same. It would have been really hard on her to do further surgery in another area. My sympathy for you
Play well at the bridge little one.