Endoscopic Ultrasound. As a substitute to MRI that provides very similar pictures, an endoscopic ultrasound goes inside your anus by using a very small lighted digicam along with a very small ultrasound probe. Recurring fistula. An anal fistula may perhaps come back after surgical treatment if it doesn’t heal entirely. https://sarthicare.com/top-symptoms-that-require-fissure-treatment-in-bangalore/