I wish I could remember what he called it but he said it wasn't anything to worry about (I think he knows I worry about everything). It also has not grown. Her last odd looking growth turned out to be a wart on her hip.
With your horse if they get odd shaped and bleed absolutely at least call the vet and tell him/her what you are seeing. I think I would still email the photo just to let the vet know what is going on.
If you ever find yourself in a fair fight, it's because your tactics suck. ~ Marine 1SGT J. Reifinger