Transperineal repair of persistent rectovaginal fistulas using an acellular cadaveric dermal graft (AlloDerm). 
A number of surgical techniques have been described to treat rectovaginal fistulas.  Recurrent or persistent fistulas after previous repair can be particularly difficult to treat.  We report a novel technique used to successfully repair rectovaginal fistulas after failed mucosal advancement flap procedures using a transperineal-layered closure with an interposed graft of acellular cadaveric dermis (Alloderm).