MRI evaluates anatomy and treatment response of perianal fistulas in Crohn disease, indicating improved diagnosis and management.
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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Lanier et al. (2026) studied this question.
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