A 32-year-old male complains of progressive, severe, generalized headaches that began 3 months ago, are worse in the mornings, and lately have been accompanied by projectile vomiting. He has also lost his upper gaze, and on physical examination, the upper part of the sclera is visible above the downward-looking irises. Which of the following is the most likely diagnosis?

1. A)Tumor in the area of the pineal glandGABARITO
2. B)Nelson syndrome
3. C)Pituitary apoplexy
4. D)Brain tumor affecting the frontal lobe
5. E)Posterior fossa tumor