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Peri-pouch fistulas are similar to Crohn's perianal fistulas except that, instead of the rectum containing the internal opening of the fistula, the internal opening is in the ileal pouch, constructed in place of the rectum. Unfortunately, reconstructive pouch surgery or trans-anal repairs of fistula tracts are often not offered to patients due to complications associated with poor wound healing and ongoing pouch dysfunction. Adult allogeneic bone-marrow-derived mesenchymal stem cells for the treatment of anovaginal and perianal fistulas in the setting of Crohn's like phenotype of the ileal pouch-anal anastomosis - a video vignette. [Extracted from the article]