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CRN histological scoring system for grading of fibrosis in NAFLD (24)
| Stage of fibrosis | CRN scoring system |
| 0 | No fibrosis |
| 1A | Mild perisinusoidal |
| 1B | Moderate perisinusoidal |
| 1C | Portal/periportal fibrosis |
| 2 | Perisinusoidal and portal/periportal |
| 3 | Bridging fibrosis |
| 4 | Cirrhosis |
