Causes
Rectovaginal fistulae are often the result of trauma during childbirth (in which case it is known as obstetric fistula) in situations where there is inadequate health care, such as in some developing countries. Risk factors include prolonged labour, difficult instrumental delivery and paramedian episiotomy. Rates in Eritrea are estimated as high as 350 per 100,000 vaginal births. Fistulas can also develop in women and children who are raped; women with rectovaginal fistulae are often stigmatized in third world countries, and become outcasts. It is also associated with female genital mutilation.
Rectovaginal fistulae can also be a symptom of various diseases, including infection by lymphogranuloma venereum, or the unintended result of surgery, such as episiotomy or sexual reassignment surgery. They may present as a complication of vaginal surgery, including vaginal hysterectomy. They are a recognized presentation of rectal carcinoma or rarely diverticular disease of the bowel or Crohn's disease. They are seen rarely after radiotherapy treatment for cervical cancer.
Read more about this topic: Rectovaginal Fistula