 The LIFT ligation of intersphincteric fistula tract procedure is a newer option for the treatment of transsphincteric fistulas. Initial results have been promising. However, some fistulas recur after the LIFT procedure because the divided ends of the fistula tract recanalize. Insertion of a barrier into the intersphincteric space may prevent this process. Strattice is acellular porcine dermis, will be used for this purpose. 