Prospective Comparison of Hydrogen Peroxide-Enhanced Three-Dimensional Endoanal Ultrasonography and Endoanal Magnetic Resonance Imaging of Perianal Fistulas

Abstract

For evaluation of perianal fistulas, hydrogen peroxide-enhanced three-dimensional endoanal ultrasonography and endoanal magnetic resonance imaging have good agreement, especially for classification of the primary fistula tract and the location of an internal opening. These results also show good agreement compared with surgical findings. Therefore, hydrogen peroxide-enhanced three-dimensional endoanal ultrasonography and endoanal magnetic resonance imaging can both be used as reliable methods for preoperative evaluation of perianal fistulas.