The pituitary gland weighs about 0.5 to 1 gram and is divided into an anterior and a posterior lobe. It is located at the base of the brain and is connected to the brain by a thin stalk. Magnetic resonance imaging (MRI) is the best method for visualization of pituitary gland and its associated disorders, such as pituitary tumors. There are many conditions that involve the pituitary: pituitary tumors; pituitary cysts; infections and inflammatory conditions and non-pituitary tumors. Pituitary tumors are responsible for a majority of hormone abnormalities involving the pituitary glands.