Magnetic
resonance imaging of sellar and juxtasellar abnormalities in the paediatric population: an imaging review. Severe hypoplasia of the anterior pituitary gland. Pre-contrast (a) and post-contrast (b) MR images show severe hypoplasia of the anterior pituitary gland which shows only minimal contrast enhancement along the floor of the sella. The ectopic posterior pituitary is located adjacent to the optic chiasm