<unk>  <unk>  is a syndrome characterized by the excretion of abnormally large volumes of<unk> lute urine. It can be classified into three fundamentally<unk> fferent types that must be<unk> stinguished from one another in order to facilitate appropriate<unk> agnosis and treatment. These are central<unk>  (also called neurogenic<unk> , which occurs due to inadequate production and secretion of antidiuretic hormone, arginine vasopressin (AVP); nephrogenic<unk> , which occurs due to renal insensitivity to the antidiuretic effect of AVP; and primary polydipsia (also known as psychogenic<unk> , which occurs due to the suppression of arginine vasopressin secretion by excessive fluid intake. Patients with<unk>  typically present with excessive day and nighttime urination and excessive fluid intake in order to compensate for the lost fluids in urine, which may lead to electrolyte imbalances such as hypo- or hypernatremia. The causes of<unk>  are unique to each variation of the<unk> sease, and a treatment plan should be targeted toward the underlying cause of the<unk> sease.
Diabetes insipidus
Nephrogenic diabetes insipidus
Urinary urgency
Oliguria
Nocturia
Dysuria
Polydipsia
Polyuria