panhypopituitarism

noun

pan·​hy·​po·​pi·​tu·​ita·​rism (ˈ)pan-ˌhī-pō-pə-ˈt(y)ü-ət-ə-ˌriz-əm, -ˈt(y)ü-ə-ˌtriz-əm 

: generalized secretory deficiency of the anterior lobe of the pituitary gland

also : a disorder (as Simmonds' disease) characterized by such deficiency