Hypopituitarism: a difficult diagnosis in elderly people--but worth a search.
Jolobe
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D000368:Aged; D015577:Geriatric Assessment; D006801:Humans; D007010:Hyponatremia / Q000175:diagnosis / Q000209:etiology; D007018:Hypopituitarism / Q000175:diagnosis* / Q000209:etiology; D010901:Pituitary Function Tests; D014882:Water-Electrolyte Balance / Q000502:physiology