Would the draining not indicate an abscess over a tumour although there could still be a tumour under it? I'm really interested in this thread as one of my mice now has a lump on the side of her face. I was hoping it would open and drain but nothing and tumour removal on a mouse the age of mine really isn't an option. I wonder if these zymbal gland tumours can be found in mice as well as her face looks just like the poor little rattie in the first picture.
Keep posting on Buddy's progress, I'll be thinking about him. :heart: