| http://www.w3.org/ns/prov#value | - e kidneys. symptoms usually develop between the ages of 30 and 40, but they can begin earlier, even in childhood. the most common symptoms are pain in the back and the sides and headaches. other symptoms include liver and pancreatic cysts, urinary tract infections, abnormal heart valves, high blood pressure, kidney stones, brain aneurysms, and diverticulosis. about 90 percent of all cases of polyc
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