Definition: Postpituitary is a term used in medicine to refer to the area of the brain where hormones are produced and released. It's often referred to as the "pituitary gland" because it is located just above the pituitary gland, which is part of the brainstem. Postpituitary hormones include growth hormone, thyroid-stimulating hormone (TSH), prolactin, and adrenocorticotropic hormone (ACTH). These hormones are released from the