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Essential Elements of the NASH CRN Scoring System (35)
| Numerical Grade or Stage | Feature |
|---|---|
| Fibrosis
| |
| 0 | None |
| 1 | Perisinusoidal or periportal fibrosis; 3 substages defined |
| 2 | Perisinusoidal and periportal fibrosis |
| 3 | Bridging fibrosis |
| 4 | Cirrhosis |
|
| |
| Ballooning
| |
| 0 | None |
| 1 | Few |
| 2 | Many |
|
| |
| Lobular Inflammation
| |
| 0 | No foci |
| 1 | <2 foci per 20× field |
| 2 | 2–4 foci per 20× field |
| 3 | >4 foci per 20× field |
|
| |
| Portal Inflammation
| |
| 0 | None |
| 1 | Mild |
| 2 | More than mild |
| 3 | |
|
| |
| Steatosis
| |
| 0 | <5% |
| 1 | 5% to 33% |
| 2 | 33% to 67% |
| 3 | >67% |
