What are the 4 syndromes of DI?

Primary polydipsia (pathophysiology of excess water intake, may be due to increased thirst by an abstruction of hypothalamus or damage to it causing this increased thirst) Hypothalamic DI (Pathophysiology of decreased synthesis or secretion of ADH) DI of pregnancy (pathophysiology of accelerated metabolism of vasopressin due to vasopressinase in placenta) Nephrogenic DI (pathophysiology of lack of appropriate response to vasopressin by kidney, due to receptor issue (genetic...))