Figure 3a-3: Sagittal histological section through the brain illustrating the anatomical relationship of the pituitary gland to other structures at the base of the human brain (AH = adenohypophysis, NH = neurohypophysis, PS = pituitary stalk, OC = optic chiasm). This figure was published in Surgical pathology of the nervous system and its coverings 4th Edition, Burger, Scheithauer and Vogel, Chapter 9 Region of the sella turcica page 438, Copyright Elsevier (2002).