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Doctors don’t know exactly what causes simple kidney cysts. They do have a few possible explanations. Each kidney has about a million tiny tubules that collect urine. Cysts may start to grow when a tube becomes blocked, swells up, and fills with fluid. Another possibility is that cysts start when pouches called diverticula form in weakened areas of the tubules and fill with fluid.  You’re more likely to have kidney cysts as you get older. By age 40, about 25 percent of people will have them. By age 50, about 50 percent of people will have kidney cysts. Men are at greater risk than women of developing kidney cysts. 

Polycystic kidney disease (PKD), is an inherited condition, meaning it’s caused by changes to genes that are passed down through families.


April 21, 2018 - 4:30am


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