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 Indian J Med Microbiol  
 

Figure 5 (a-e):Combined trans- and extrasphincteric fi stula. Conventional fi stulogram (a) shows a right-sided large well-defi ned fi stula (arrow). CT fi stulogram (b) depicts contrast in the rectum (long arrow) with two closely located tracts, one lying close to the midline (short arrow) and the other being lateral (curved arrow) to the right external sphincter (extrasphincteric). The axial fat-saturated T2W images (c and d) reveal one tract to be transsphincteric (arrow in c) and the other to be extrasphincteric (arrow in d). Coronal T1W image (e) depicts the complete course of the extrasphincteric tract (arrow)

Figure 5 (a-e):Combined trans- and extrasphincteric fi stula. Conventional fi stulogram (a) shows a right-sided large well-defi ned fi stula (arrow). CT fi stulogram (b) depicts contrast in the rectum (long arrow) with two closely located tracts, one lying close to the midline (short arrow) and the other being lateral (curved arrow) to the right external sphincter (extrasphincteric). The axial fat-saturated T2W images (c and d) reveal one tract to be transsphincteric (arrow in c) and the other to be extrasphincteric (arrow in d). Coronal T1W image (e) depicts the complete course of the extrasphincteric tract (arrow)