Treatment of Crohn's Disease in Perianal Fistulizing Crohn's Disease
Perianal fistulizing Crohn's disease is a challenging manifestation of Crohn's disease that requires a carefully staged approach, combining surgical and medical strategies to achieve fistula closure and cessation of drainage.
Patients with Crohn's disease presenting with perianal fistulas — including anorectal fistulas — represent a distinct therapeutic subgroup. Evidence-based guidelines specifically address this population, with strong recommendations supporting targeted intervention to induce remission.
Management begins with surgical optimisation to facilitate drainage before any advanced medical therapy is initiated. For patients with simple perianal fistulas, antibiotic therapy may be considered as a primary treatment option. The full structured protocol — covering agent selection, sequencing, and escalation — is available via the link below.
- We recommend infliximab use for induction of remission of perianal fistulizing CD (strong recommendation, moderate level of evidence).
- Drainage of perianal abscesses with appropriate placement of setons to facilitate drainage should be undertaken before treating perianal fistulizing disease with advanced therapy to increase treatment effectiveness.
- Antibiotics (imidazoles) can be considered for patients with simple perianal fistulas as a primary therapy.