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  Indian J Med Microbiol
 

Figure 3: Grade 3 nonbranching thick fistulous tract (arrow) with its external opening at the medial aspect of the left gluteal region (curved arrow) passing superiorly to the ischiorectal fossa, then, curved medially, piercing the external and internal anal sphincters to end in the anal canal at its left posterolateral wall, just below the level of the left levator ani muscles (arrowhead). (a and b) Coronal STIR images. (c and d) Axial T2 FSE images.

Figure 3: Grade 3 nonbranching thick fistulous tract (arrow) with its external opening at the medial aspect of the left gluteal region (curved arrow) passing superiorly to the ischiorectal fossa, then, curved medially, piercing the external and internal anal sphincters to end in the anal canal at its left posterolateral wall, just below the level of the left levator ani muscles (arrowhead). (a and b) Coronal STIR images. (c and d) Axial T2 FSE images.