NCIt related terms : PSIS; Hypoplastic Anterior Pituitary, Missing Stalk, and Ectopic Posterior Pituitary;
Alternative definition : NICHD: A syndrome characterized by hypoplastic or aplastic anterior pituitary gland,
a very thin or interrupted pituitary stalk, and ectopic or absent posterior pituitary
gland, which may be associated with mutation(s) in the HESX1 or LHX4 genes.;