Primary hyperoxaluria (PH) is not just one disease but rather a group of three rare genetic disorders: PH1, PH2 and PH3. They are linked to different genes, and each one causes you to make too much oxalate, a waste product produced by your body.About 8,700 people in the United States have PH, but most do not know it. Among people who are diagnosed:8 in 10 have PH11 in 10 have PH21 in 10 have PH3 All types of PH can lead to painful kidney stones, which often require visits to emergency departments and sometimes surgeries, but PH1 is the most damaging to your kidneys.If someone has PH, their par...

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