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February 14, 2026Radiographics2 citationsOpen Access

MRI of Perianal Fistulas: Anatomy, Diagnosis, and Perianal Crohn Disease Treatment Monitoring

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MLM. Hunter LanierMHMark J. HoeggerMIMalak Itani

Key Points

  • The research aims to assess the effectiveness of MRI in diagnosing and managing perianal fistulas associated with Crohn disease.
  • Describes the MRI imaging technique used to visualize perianal fistulas.
  • Details the classification of fistulas based on MRI findings.
  • Emphasizes the role of MRI in quantifying fibrosis and fluid.
  • MRI serves as the reference standard for diagnosing perianal fistulas.
  • Demonstrates the ability to classify fistulas and assess the degree of fibrosis versus fluid.
  • Supports surgical planning and monitoring treatment responses in Crohn disease.

Abstract

MRI is the imaging reference standard for diagnosing, classifying, and monitoring perianal fistulas in Crohn disease and cryptoglandular disease, combining quantification of the amount of fibrosis versus fluid, precise mapping of the sphincter, and classification-driven reporting to guide surgery and assess treatment response.

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Cite This Study

Lanier et al. (2026) studied this question.

synapsesocial.com/papers/699011522ccff479cfe57e9ahttps://doi.org/10.1148/rg.250033
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