A fistula is an abnormal connection or passageway between two epithelial-lined organs that normally do not connect.  Examples include vesicovaginal, rectovaginal, urethrovaginal, etc. A vesicovaginal fistula occurs between the bladder and the vagina; a rectovaginal fistula occurs between the rectum and the vagina.

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Urinary Fistula

Rectovaginal Fistula