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Fig. 1D —68-year-old man with fecal incontinence and diabetes mellitus. MR images show normal anatomy of external anal sphincter (EAS) and internal anal sphincter (IAS). Neither thinning of EAS muscle nor diffuse replacement of EAS muscle by fat is seen. C = endoanal coil. Coronal external phased-array T2-weighted fast spin-echo image (2,500/70).