الفهرس 
Role of MRI in assessment of perianal fistula and its classifications
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Abstract
MRI has become the modality of choice for detecting the perianal fistula also considered an excellent method for preoperative assessment, detect the hidden areas of sepsis in order to prevent recurrence. It helps in accurately classify the perianal fistula into 5 grades according to ST Jame{u2019}s university MR imaging based grading system. MRI allows precise definition of the fistula tract and identification of secondary tracts and abscesses. We prospective study 30 patients with clinical diagnosis of perianal fistula