Hereditary Xanthinuria: Causes, Symptoms, and Treatment
Medically reviewed by Harsha Moole, MD, Internal Medicine. Last reviewed: October 2, 2026.
What kind of doctor treats Hereditary Xanthinuria?
A primary care doctor is often the first to notice the condition or manage it day to day. A nephrologist, a doctor who specializes in kidney diseases, may help when stones form or kidney function is affected. A geneticist can help with testing and family planning questions.
What is hereditary xanthinuria?
Hereditary xanthinuria is a rare inherited condition. In this condition, the body has trouble breaking down certain building blocks of proteins called purines. This causes a substance called xanthine to build up in the blood and urine. Many people have no symptoms at all. Others develop kidney problems.
The body normally breaks down purines, which are found in many foods and also made by the body itself. An enzyme usually turns purines into uric acid, which then leaves the body in urine. In hereditary xanthinuria, this enzyme does not work properly. Xanthine builds up instead of turning into uric acid. Because xanthine does not dissolve well in urine, it can form crystals or kidney stones.
Symptoms
Many people with hereditary xanthinuria never notice anything wrong. When symptoms do happen, they often come from kidney stones. Possible signs include pain in the side or back, blood in the urine, pain when urinating, or repeated urinary tract infections. In rare forms of the condition, muscle problems can also occur.
Causes and who gets it
Hereditary xanthinuria is caused by changes, sometimes called mutations, in a gene that carries instructions for making the enzyme that breaks down purines. A child must receive a changed copy of the gene from both parents to have the condition. The condition is very rare, and it affects males and females.
How doctors diagnose it
Doctors often suspect hereditary xanthinuria when a routine blood test shows very low uric acid levels, or when a person passes kidney stones made of xanthine. Urine and blood tests can measure xanthine and uric acid levels, and genetic testing can confirm the diagnosis. Doctors may also use imaging tests, such as an ultrasound, to look at the kidneys.
Treatment
There is no cure for hereditary xanthinuria, but treatment can lower the chance of kidney stones and protect the kidneys. Doctors usually advise drinking plenty of water throughout the day, and some people are told to eat less of foods that are high in purines, such as certain meats and seafood. If stones do form, treatment is similar to treatment for other kinds of kidney stones. Some people need no treatment at all.
When to see a doctor
Anyone with symptoms of a kidney stone should see a doctor. Warning signs include severe pain in the side or back, blood in the urine, fever with painful urination, or trouble passing urine. Early attention can help protect kidney health over time.
How a direct primary care or concierge doctor fits in
A direct primary care doctor charges a flat monthly fee instead of billing insurance for visits. This type of doctor can often manage hereditary xanthinuria directly when it is mild, including ordering tests, advising on hydration and diet, and checking in regularly. A concierge doctor usually charges more and often works alongside insurance, offering similar care with more time per visit. If stones keep coming back or kidney function declines, either type of doctor would refer the patient to a nephrologist.
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Medical Disclaimer
This content is for general educational and informational purposes only and is not medical advice. It is not a substitute for professional medical advice, diagnosis, or treatment, and reading it does not create a doctor-patient relationship. Always seek the advice of your physician or another qualified health provider with any questions about a medical condition, and never disregard or delay seeking professional advice because of something you read here. If you think you may have a medical emergency, call 911 (or your local emergency number) immediately.
