CausesBy Mayo Clinic staff
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While the cause of fibromuscular dysplasia is unknown, it's believed that several factors may play a role.
- Genetics. Genetics may play a role in the development of fibromuscular dysplasia. But, if another family member has fibromuscular dysplasia, you or a relative may never get fibromuscular dysplasia, or you might get the condition in a different artery or have a milder case or a more severe case than your family member's fibromuscular dysplasia. In addition, not everyone who has fibromuscular dysplasia has a relative with the disease.
- Hormones. Because premenopausal women have fibromuscular dysplasia more often than men do, hormones may be linked to the development of fibromuscular dysplasia. However, fibromuscular dysplasia is not linked to how many pregnancies a woman has had, when she gives birth or whether she's taken birth control pills.
- Abnormally formed arteries. Fibromuscular dysplasia could be caused by inadequate oxygen to the arteries that supply your blood vessel walls with blood, which causes the vessels to form abnormally. It could also be caused if the position of your arteries in your body is abnormal, or if a medication or tobacco causes your arteries to develop abnormally. Once the artery develops abnormally, a cluster of cells builds in the artery wall, narrowing it and reducing blood flow.
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