Praxis Medical Insights

Fistulotomy involves laying open the entire fistula tract from internal to external opening, permanently converting a tubular tract into an open groove in the anal canal, which is a fundamental change to the anal structure 1, 2.
The procedure creates a permanent anatomical defect where sphincter muscle and overlying tissue are divided and left to heal by secondary intention, altering the three-dimensional architecture of the anal canal 2.
The amount of sphincter muscle that will be divided must be disclosed, as this directly correlates with both anatomical change and incontinence risk (10-20% baseline risk of continence disturbances) 3, 4.

Impact on Future Treatment Options and Quality of Life

The anatomical changes from fistulotomy make repeat sphincterotomy "catastrophically dangerous" if fistula recurs, limiting future treatment options to sphincter-preserving approaches only 3, 4.
For Crohn's disease patients, the anatomical changes may preclude certain reconstructive options if disease progresses 1, 5.
Alternative sphincter-preserving approaches (setons, LIFT, advancement flaps) preserve more normal anatomy and should be discussed as options that avoid the structural changes of fistulotomy 1, 2, 5.

Patients have the right to understand that the surgery creates a permanent structural defect, and some may decline fistulotomy specifically because of anatomical concerns, even accepting incontinence risk 3, 4.
The American Society of Colon and Rectal Surgeons recommends that patients be informed about the anatomical changes associated with fistulotomy, including the creation of a permanent groove or channel in the anal canal 1, 2.