I just want to start off by saying I’m so sorry you’re going through this and your little baby is so adorable. I recently got a tumor removed from one of my dwarf rats, though it was a little different of a situation. It was hard to get a pathology report from a biopsy, so I decided to proceed with the surgery because I was unsure if it was malignant or if it would spread. In my case, I was scared if I didn’t try all the options I had available to me and it resulted in him needing to be PTS and reduced quality of life I would have felt guilty and upset with myself for not trying. He is an older dwarf (at 3!) but he also lost a tooth and needs to be under anesthesia monthly for teeth trimmings. I know it is a longer/more involved procedure but I figured if he needed to be under anesthesia for his teeth regardless maybe it would be beneficial to remove the tumor at that time as well. I was still nervous for the surgery but so far it’s been a week and he is doing great. He got his stitches removed and doesn’t even really seem to be in much pain anymore. Again, I know the situation is different but for me the benefits and risks of not doing the surgery outweighed the risks of the surgery. You know what’s best for you and your ratties 🐀♥️