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They are rare in women under 20 or in those who have gone through menopause. They are more common in African-Americans than Caucasians.The cause of uterine fibroid tumors is unknown.
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No one knows exactly what causes fibroids. However, the growth of fibroids appears to depend on the hormone estrogen.
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A healthcare provider can usually feel fibroids during a routine pelvic examination. Ultrasound can be used to confirm the diagnosis, but this is not generally necessary.
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