The pituitary gland is a small, bean-shaped gland situated at the base of a person’s brain, behind the nose and just below the optic nerve. The pituitary gland is known as the “master gland.” If this gland malfunctions, it can cause big problems in your body and the symptoms of pituitary disorders can vary greatly. This is one more reason to pay attention to your body. Learn how a pituitary tumor diagnosis is confirmed and the latest treatments available, including an advanced, minimally invasive endoscopic surgery currently being performed at UCLA when appropriate.