Abstract
Patients with Crohn's disease frequently suffer from fistula resulting from adverse sequelae of persistent complicated active disease or surgical intervention. Fistula affects a patient's quality of life and is directly associated with the need for surgical intervention. Diagnosis of fistula can be made through CT enterography, MR enterography, gastrograffin-based imaging, and transanal ultrasound. Treatment for fistula mainly consists of medication, endoscopic procedures, and surgery. There are emerging approaches under current investigation, such as stem cell therapy. The results showed a decent response in patients with perianal and rectovaginal fistula with minimal side effects. Further investigation is still needed for other internal fistula.