Like kuhio98, I, too, have had experience with this awful disease; my Morganna went to the Bridge because of it several years ago. In her case, the tumor was on her rump and was caused by the 3-year rabies vaccine. She had a surgery for a biopsy, and another to remove the tumor. When the tumor returned the following year, we were referred to a veterinary surgeon who removed most of Morganna's hind leg. She was 'clean' for nearly two years when the tumor returned a second time. I made the decision to keep her as comfortable as possible for as long as possible, then I had her sent to the Bridge.

My understanding of fibrosarcoma is much like kuhio's: it doesn't spread, it just grows. In other words, it seems unlikely that it's in her lungs - to me, at least, but I'm no vet or vet tech. I also wonder that there are two of them. Morganna's tumor was caused by an excessive reaction to the adjuvant in the 3-year vaccine; Halo's was caused by the injection of her microchip. What has Claire had that might cause fibrosarcoma? I hope with all my heart that I'm right and the vet is wrong. Please keep us posted on what happens. A prayer for Claire has just been said.