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Egyptian Journal of Radiology and Nuclear Medicine
Fig. 6 | Egyptian Journal of Radiology and Nuclear Medicine

Fig. 6

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

Fig. 6

a, b, c MRI axial T2 and sagittal STIR WI images show left posterior high trans-sphincteric fistulous tract (red arrows) seen crossing the midline at the level of deep portion of external anal sphincter ending in right inter-sphincteric collection between 6–9 o'clock eliciting high T2&STIR signal (yellow arrows). d, f ultrasound axial and post reconstruction coronal images show left posterior high trans-sphincteric hypoechoic fistulous tract (yellow arrows) seen breaching the deep portion of the external anal sphincter and ending in right posterior and midline hypoechoic collection e, g with internal echogenic foci between 6–9 o'clock (blue arrows) at the level of the right puborectalis muscle

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