Incidence and type of spontaneous fistulae found in patients with Crohn's disease or diverticulitis
| Disease | Spontaneous fistula incidence (%) | Fistula type |
|---|---|---|
| Crohn's disease | 43 (23–48)24–27 | 66% external/perianal, 34% internal (25% ileosigmoid, 23% other ileocolic, 20% ileovesical, 12% ileum/rectum to female genital tract, 11% ileoileal, 9% coloenteric)27,27 |
| Diverticulitis | 1,27 1228 | 58% colovesical, 33% colovaginal, 4% coloenteric, 3% colocutaneous, 1% colotubal29,30 |