فهرست نشریات علمی دسترسی آزاد ایران

Results: Endoanal sonography was done in 1418 patients from March 2011 to December 2013. In 83% of patients anal canal structure was normal, and in 17% of patients, pathological findings such as anal canal tumor, peri-anal fistula and anal sphincter muscle damage were found. Comparing to other modalities, endoanal sonography had most accuracy in diagnosis of patients with fecal incontinence and was very helpful for colorectal surgeons in decision making for patients with anal canal tumors. In 5 patients with anal canal tumor, primary decision of local excision was changed to AP resection because of detecting T2 or T3 involvements. In 2 patients who insisted on local excision, deep tissue involvement was revealed on histopathology. In patients with incontinence due to sphincter damage, the detected site of damage was accurate in 100% of patients, and colorectal surgeons could confidently rely on sonography findings for approach to the site of sphincter defect. In 15 patients with longstanding anal pain, a small peri-anal cold abscess was detected on endoanal sonography. These abscesses had not been diagnosed prior to ultra sound scanning and were eventually approached and treated under the guide of sonography. Conclusion: Endoanal sonography can be the best modality in detection of anal canal diseases if there is close cooperation between radiologists and colorectal surgeons.