My female rat of 2 years old has a tumour beside her genitals which was first noticed September and was growing slowly but since December it has grown rapidly. She has been to the vets a few times and we tried treatment to see whether it would slow down the growth rate or potentially reduce it. We took a sample to see whether it was a tumour or abscess etc and it is a tumour. When it was smaller than it is now the vets felt it was in too of a risky area to try to operate to remove it and now it’s larger I’m even more concerned. She is such a happy and lovely girl.. I really don’t want to lose her and was wondering whether anyone else has had this situation and what the results was and if there is anything we can do at all. I have attached the most recent photo of her tumour.