- Messages
- 19,809
- Reaction score
- 36,916
- Points
- 1,373
I hope it isn't. It's possible it could just be a cyst. Not all tumours have stems. Some can still be quite mobile. If you do manage to feel gently and he doesn't get too stressed by that, you could try to feel if it is a hard lump or a squishy lump, but only the vet will really be able to tell. He's not that old so it could quite easily be just a cyst.