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Figure b: (a) Sagittal and (b) coronal T1-weighted MR images (repetition time msec/echo time msec, 500/12; section thickness, 3 mm) obtained through the sella show absence of the anterior pituitary gland. The absence of a high-signal-intensity area indicates that the posterior pituitary gland is not seen in either the sella or the hypothalamic region. The sella turcica (arrow) is flattened and shallow. The optic chiasm (arrowhead) is normal in size and morphology. (c) Transverse T1-weighted MR image (525/10; section thickness, 3 mm) obtained through the suprasellar region shows that there is no pituitary stalk, but there are normal optic nerves (arrowheads).
