GH1 and hypopituitarism: As opposed to panhypopituitarism, in which all pituitary hormones are deficient, hypopituitarism can present as a deficiency of individual anterior pituitary hormones (e.g., adrenocorticotropic hormone, thyroid-stimulating hormone (TSH), luteinizing hormone (LH), follicle-stimulating hormone (FSH), prolactin, growth hormone) or posterior pituitary hormones (e.g., oxytocin, vasopressin) [5].