Hypopituitarism's the decreased (hypo) secretion of one or more of the eight hormones normally produced by the pituitary gland at the base of the brain. If there's decreased secretion of most pituitary hormones, the term panhypopituitarism (pan meaning "all")'s used. The signs and symptoms of hypopituitarism vary, depending on which hormones are undersecreted and on the underlying cause of the abnormality. The diagnosis of hypopituitarism's made by blood tests, but often specific scans and othe… (More on Hypopituitarism)