Kidney cysts are round pouches of fluid on or within the kidneys. They can be related to serious disorders and should be examined by a medical professional as soon as possible. Cysts can harm normal kidney function, but are usually noncancerous and rarely develop complications. Researchers are still trying to determine the causes of kidney cysts.


1. Weak Spot on Kidney

Scientists and medical professionals are working to better understand the causes of kidney cysts. One theory suggests the culprit could be a weak spot on the kidney. A pouch forms and fills with fluid (a diverticulum), then detaches as a cyst.

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