Caution in using 3D-EAUS as the first-line diagnostic tool in the preoperative work up for perianal fistulas

  • Rishi Philip MathewEmail author
  • Vimal Patel
  • Gavin Low


MRI is considered the de facto imaging modality for evaluating perianal fistulas, primarily due to its excellent soft tissue contrast, operator independence, multiplanar capabilities and excellent field of view. Tridimensional endoanal ultrasound (3D-EAUS) is inferior to MRI in identifying and/or evaluating ischiorectal/supralevator tracks/extensions and therefore could end up providing incomplete and even inaccurate information (e.g. misclassification of tracks) to the surgeon, with a missed track potentially leading to recurrence of the disease.


Compliance with ethical standards

Conflict of interest

The authors declare no conflict of interest, and all authors have provided their consent.

Ethical standards

The manuscript does not contain clinical studies or patient data.


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Copyright information

© Italian Society of Medical Radiology 2019

Authors and Affiliations

  1. 1.EdmontonCanada
  2. 2.Department of Radiology and Diagnostic Imaging, Faculty of Medicine and DentistryUniversity of AlbertaEdmontonCanada

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