The pituitary gland is a pea-sized structure located at the base of your brain, behind your nose. It produces hormones and directs other glands in your body to produce hormones.
Tumors on the pituitary gland are common and may not cause problems. But if the tumor causes your body to produce too many or too few hormones, it can create an imbalance that may lead to a variety of symptoms and conditions. A pituitary tumor can also press on nearby nerves connected to your eyes, causing vision problems.
Most pituitary tumors are benign (called pituitary adenoma). Rarely, a pituitary tumor is cancerous (called pituitary carcinoma) and can spread beyond the pituitary gland.