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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 2 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 2

From: Role of endoanal ultrasound in the assessment of perianal fistula in correlation with MRI fistulography

Fig. 2

a MRI axial T2 WI images showing left perianal region trans-sphincteric fistulous tract breaching the deep part of the external anal sphincter opposite 1 o'clock (yellow arrow). b MRI coronal STIR WI images showing high signal trans-sphincteric fistulous tract ending just below the inferior margin of the left puborectalis (blue arrow). c, d ultrasound axial images show left hypoechoic trans-sphincteric fistulous tract breaching the subcutaneous and deep portions of the left external anal sphincter at 12–1 o'clock (yellow arrows). e Post reconstruction ultrasound coronal images show left trans-sphincteric fistulous tract breaching the deep and superficial portions of the external sphincter (blue arrow)

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