Causes
By Mayo Clinic staffDoctors don't know what causes Behcet's disease. However, a combination of genetic and environmental factors likely plays a role. Several genes have been found to be associated with the disease. Some researchers believe a virus or bacterium may trigger Behcet's disease in people who have certain genes that make them susceptible to Behcet's.
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- Calamia KT (expert opinion). Mayo Clinic, Rochester, Minn. Sept. 6, 2010.

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