Originally Posted by natisha
Has that site ever been ultrasounded or cultured? There could be a foreign body in there, like a little splinter. That could explain the open non-healing tract.
Excellent observation Natisha. Heaven knows mares itch on posts, sides of the barn, etc. Friend's horse had very small but long sliver in his horse for months before they unltrasounded to see why an abscess would not clear.
That being said - Melonoma strikes at any age. I lost an eight year old mare to rapidly progressive invasive melanoma. She had a couple of spots under her tail when I got her at 3 years of age. We had one removed from her face where the bridle sat. (Only ones advised to remove were those that were rubbed on by any tack)
I found a bump on her neck in January. Small. Vet said the only reason I noticed it was I am the most observant horse owner she knows. (January, Minnesota = cold, TONS of hair on a horse). Within two weeks she was gone. The vet tried to excise but it was too entwined in her carotid artery. Eventually would of cut the blood supply to her brain. I didn't want her to suffer so we never woke her from surgery.