Epidemiology
It tends to occur between 14 and 50 years of age, but it has also been found in children younger than age 14. In one study, women were found to be affected more often than men.
A few thousand cases have been confirmed in the U.S., but some experts believe it affects up to 5% of the population. When presumably healthy kidney donors are screened with X-rays, FMD has been found in close to 4%.
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