N28: Other disorders of kidney and ureter, not elsewhere classified

N28.1: Cyst of kidney

There are normally 2 kidneys in the body. They filter blood and create urine. They thus help to detoxify the body. Furthermore, the kidneys regulate the blood pressure and salt content in the blood, among other things.

The causes of such fluid-filled cavities are not yet fully understood. Such fluid-filled cavities may occur, though, when the person has had another kidney condition for a long time, for example.