Figure 4. Sagittal T1-weighted image of the pituitary fossa demonstrates normal pituitary anatomy. The T1-weighted study is particularly helpful in identifying the posterior pituitary bright spot (white arrow)- a focus of T1 signal hyperintensity posteriorly in the sella, which corresponds with the neurohypophysis. The intrinsic T1 signal shortening through the posterior pituitary is thought to be due to the presence of vasopressin. The zoomed image of the pituitary gland, consisting of the anterior (A) and posterior (P) lobes, sits within the sella turcica, a “saddle”-shaped depression in the sphenoid bone, with the tuberculum sellae anteriorly, and the dorsum sellae posteriorly. Superior to the pituitary gland is CSF within the hypophyseal and suprasellar cisterns. The pituitary stalk (S), also known as the infundibulum or infundibular stalk, extends through the suprasellar cistern, extending between the hypothalamus and the superior surface of the pituitary gland. The optic chiasm (C) can be seen in the suprasellar space more superiorly. Anteroinferior to the pituitary gland is the sphenoid sinus (SS). (B)- brainstem, (M)- mammillary bodies, (3V)- third ventricle.