Condition (cont.)
Hypopituitarism: vasopressin
(central diabetes insipidus)
no significant rise in Uosm after vasopressin administration). Other disorders producing polyuria that are unrelated to ADH abnormalities include osmotic diuresis (glucosuria in diabetes mellitus, mannitol, urea), diuretic use, and hypercalcemia (metastat
ACTH stimulation test: short
ACTH stimulation test does not distinguish hypopituitarism / hypothalamic cause of hypocortisolism from primary hypocortisolism (Addisonís disease), since cortisol remains decreased in both. Prolonged ACTH stimulation (3 days) and measurement of urine