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Anal ulcer. Diffuse hyperintensity of the left anal margin is present on T2-weighted images, and enhancement is present in the post-gadolinium sequence (arrows). A true fistula developed during follow-up (open arrows). a Oblique-transverse fat-supressed T2-weighted image. b Oblique-coronal T2-weighted image. c Oblique-transverse fat-supressed T2-weighted image. d Oblique-coronal T2-weighted image
