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Anal Fistula...
Q How is Anal
Fistula caused?
Most
fistulas begin as anorectal abscesses. When the abscess opens spontaneously
into the anal canal (or has been opened surgically), a fistula may occur. Other
causes of fistulas include tuberculosis, cancer, and inflammatory bowel
disease. Fistulas may occur singly or in multiples.
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