Optimized timing of using infliximab in perianal fistulizing Crohn's disease

Figure 1 Ligation procedure of the intersphincteric fistula tract for Crohn’s disease-related perianal fistula. A: Identification of the fistula tract with a probe; B: Ligation of the intersphincteric tract; and C: Suture of the intersphincteric incision following curetting the remnant tract.

Figure 2 Deep remission of Crohn’s disease-related perianal fistula on magnetic resonance imaging. A: Hyperintense signal on T2-weighted fat-suppression imaging showing an active suprasphincteric fistula; B: Disappearance of hyperintense signal on T2-weighted fat-suppression imaging displaying deep remission of the fistula.

Figure 3 Therapeutic strategy of perianal fistulizing Crohn’s disease. MRI: Magnetic resonance imaging.