It may not be obvious, but this amorphous thing in this picture is a cat.
This is Pipacs (Hungarian for Poppy), our smallest cat. He is a little over ten years old (exact age unknown, as he was a stray.) He was diagnosed with a bone tumor a couple of years ago, but after the doctor explained that for cats, bone tumors rarely metastasize, we decided to take a risk and not have the leg in question amputated. The main reason is that Pipacs is a very skittish kitty, and we were deeply concerned that such a drastic operation (not to mention multiple, often painful vet visits) would have traumatized him.
So far, so good. That was two and a half years ago. Fingers crossed, but although the growth is there and quite noticeable, accompanied by a small limp, it does not seem to bother him. He remains active, with no signs of pain or discomfort, and no indication of any trouble. We just hope he will stay this way for many more years to come.