Kidney Cysts

Kidney cysts are sacs that are filled with fluid within their kidneys. The exact cause of simple kidney cysts is not known but they tend to be more common as people age. Simple kidney cysts rarely cause problems and are different from polycystic kidney disease.

Kidney cysts that are causing symptoms or blocking the normal flow of blood or urine through the kidney may need to be treated using a procedure called sclerotherapy, where the cyst is punctured using a long needle, guided by ultrasound.