Role of 3 tesla magnetic resonance imaging in the Preoperative evaluation of perianal fistulas - a one- Year hospital-based cross-sectional study

Abstract

ABSTRACT Background Perianal fistulas are abnormal connections between the anal canal and perianal skin, often associated with infections, trauma, or inflammatory conditions like Crohn’s disease. Accurate preoperative evaluation is essential for determining the fistula’s complexity and guiding surgical planning. While traditional imaging techniques such as endoanal ultrasound (EAUS) and computed tomography (CT) have limitations, 3 Tesla Magnetic Resonance Imaging (3T MRI) has emerged as the gold standard due to its superior soft tissue contrast and ability to delineate fistula tracts, abscesses, and sphincter involvement. Objective To evaluate the accuracy of MRI for the diagnosis and characterisation of perianal fistula before surgery. To classify perianal fistula using 3T MRI according to the St.Jame’s university hospital MR imaging classification of perianal fistula.