Below is an instruction from Human. Write a response.
    ### Instruction:
    What is the outlook for Pituitary Tumors ?
    ### Response:
    If diagnosed early enough, the prognosis is usually excellent. If diagnosis is delayed, even a non-functioning tumor can cause problems if it grows large enough to press on the optic nerves, the brain, or the carotid arteries (the vessels that bring blood to the brain).
    