I have had a look at the pictures and they do look similar to my mare's lumps, but there are some important differences from the way you describe Bella's. The only way I can describe my horse's lumps is to say that they have a hard lump inside (which I don't think yours do?) Also, my horse was...
Hi, I'm sorry to hear about your horse's condition its awful to not know what these things are or how to treat them.
My horse has similar lumps but I'm not at all sure if it is the same as Bella's. Can your vet do another biospy? What is their advice?
What do the lumps feel like? Are they...