Internal and external anal sphincter appearance by magnetic resonance imaging in faecal incontinence (FI)
| Internal anal sphincter | External anal sphincter | |||||
|---|---|---|---|---|---|---|
| Normal/mild focal thinning | Marked focal thinning, scar, or defect | Atrophy with or without scar/defect | ||||
| Controls | FI | Controls | FI | Controls | FI | |
| Values are number of patients in each category. | ||||||
| Normal/mild focal thinning | 17 | 10 | 1 | 4 | 0 | 8 |
| Marked focal thinning, scar, or defect | 0 | 7 | 2 | 15 | 1 | 4 |
| Atrophy with or without scar/defect | 0 | 1 | 0 | 1 | 0 | 1 |