Objective: Perianal fistula is a common and debilitating disease. The definite treatment is surgery, identifying of primary and secondary tract, internal opening of fistula has important role in planning of surgical techniques. This study's goal was to determine the diagnostic accuracy of 3-D ultrasound in perianal fistula in comparison with intraoperative findings. Materials and methods: This study is a cross-sectional study. Adult patients (18–85 years old) with anal fistula have been selected. 3-D EUS was done for all patients by gastroenterologist. Then surgery was done. Check lists filled by endoscopist and surgeon was studied and data analysis was done. Results: The study examined 76 patients, in according to results for kappa coefficient there was a perfect agreement between 3-D ultrasound results and surgery in internal opening that was 96% (p
Full Text via ClinicalKey 
Full Text Finder