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Oberhuber/Marsh classification34
| Villous architecture | Crypt height | Intraepithelial lymphocytosis/ECa | Diagnostic of CD? | |
|---|---|---|---|---|
| Type 0 | Normal | Normal height | <40 IEL/100 EC | No |
| Type 1 | Normal | Normal height | >40 IEL/100 EC | No |
| Type 2 | Normal | Crypt hyperplasia | >40 IEL/100 EC | No |
| Type 3A | Mild villous flattening | Increased height | >40 IEL/100 EC | Yes |
| Type 3B | Marked villous flattening | Increased height | >40 IEL/100 EC | Yes |
| Type 3C | Total villous flattening (flat mucosa) | Increased height | >40 IEL/100 EC | Yes |
