Sinus Tumors of Bighorn Sheep

What is this disease?

  • Tumors grow from the lining of the sinuses in the:
    • Forehead
    • Horns
    • And above the teeth
  • Tumors typically cannot be seen from the outside of the head
  • Destroys bone, produces thickened sinus lining, gelatinous tissue, mucus and pus
  • Unknown cause, but likely an infectious disease that is spread between sheep
  • Found in all 3 subspecies of bighorn sheep and in herds from at least 6states, including Nevada
  • No known human health risk

For more information: Sinus Tumors of Bighorn Sheep