Non-cutting setons for progressive migration of complex fistula tracts: a new spin on an old technique.

Aim: We introduced a modification of the loose seton for high transsphincteric fistula which involved daily self-rotation of the seton by 360°, which we call the progressive migration technique. The outcomes were evaluated.

Method: A retrospective review was undertaken of all operations for anal fistula performed by a single colorectal surgeon from Jan.