关键词: 诊断, 磁共振成像, 肛瘘

Abstract: 【Abstract】〓Objective〓To explore the application value of the preoperative magnetic resonance imaging (MRI) in diagnosis of anal fistula location and type. Methods〓Fifty cases of anal fistula were examined by MRI. According to MR findings,.the position of fistula and the relationship with the sinus and external anal sphincter were analyzed..Then the MR findings were contrasted with surgical results. Results〓The imaging of MRI all accorded with the clinical diagnosis,.including 30 cases of simple anal fistula,.20 cases of complex anal fistulas..Among 50 cases,.intersphincteric fistulas were 20 cases,.trans-sphincteric fistulas 12 cases,.suprasphincteric fistulas 6 cases,.extrasphincteric fistulas 3 cases,.and superficial fistulas 9 cases..A total of 72 primary fistulas,.78 interned openings,.77 extended openings, and 17 perianal abscesses were found. The sensitivity of MRI diagnosis for primary fistula,.interned opening and perianal abscess were respectively 93.1%, 96.2%, 100% and specificity were 91.5%,.97.5%,.91.3%. Conclusion〓MRI can accurately determine the type of anal fistula, fistula number,.course,.branch,.the location of interned opening and the presence of the abscess formation, providing important guidance for clinical surgery.

Key words: Anal fistula, Diagnosis, Magnetic Resonance Imaging (MRI)