_:vb50956514 . _:vb50956514 . _:vb50956514 "url:http://en.wikipedia.org/wiki/Hypopituitarism"^^ . _:vb50956514 . _:vb50956514 . _:vb50956514 . _:vb50956514 "A pituitary gland disease characterized by the decreased secretion of one or more of the eight hormones normally produced by the pituitary gland."^^ .