Sinus Tumors of Bighorn Sheep

What is this disease?

  • Tumors grow from the lining ofthe sinuses in the:
    • Forehead
    • Horns
    • And above the teeth
  • Tumors typically cannot be seen fromthe outside of the head
  • Destroys bone, produces thickenedsinus lining, gelatinous tissue, mucusand pus
  • Unknown cause, but likely aninfectious disease that is spreadbetween sheep
  • Found in all 3 subspecies of bighornsheep and in herds from at least 6states, including Nevada
  • No known human health risk

For more information: Sinus Tumors of Bighorn Sheep