Fig. 3From: Role of transperineal ultrasound in evaluation of patients with perianal inflammatory disordersA 20-year-old male presented with perianal discharge. TPUS shows the skin opening (a), axial images show the tract extending along the inter-sphincteric plane midline posteriorly (b), with internal opening seen at 6 o’clock (arrow) (c). Oblique axial T2 FS MR image shows the inter-sphincteric tract with the site of internal opening at 6 o’clock (d)Back to article page