Diabetes insipidus (DI) is a condition characterized by excessive thirst and excretion of large amounts of severely diluted urine, with reduction of fluid intake having no effect on the latter.
There are several different types of DI, each with a different cause. The most common type is neurogenic DI, caused by a deficiency of arginine vasopressin (AVP), also known as antidiuretic hormone (ADH).
The second common type of DI is nephrogenic diabetes insipidus, which is caused by an insensitivity of the kidneys to ADH. It can also be an iatrogenic artifact of drug use.
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