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A modified ''Marsh system'' - based only on villous architecture:<ref name=pmid17544877>{{cite journal |author=Corazza GR, Villanacci V, Zambelli C, ''et al.'' |title=Comparison of the interobserver reproducibility with different histologic criteria used in celiac disease |journal=Clin. Gastroenterol. Hepatol. |volume=5 |issue=7 |pages=838–43 |year=2007 |month=July |pmid=17544877 |doi=10.1016/j.cgh.2007.03.019 |url=}}</ref> | A modified ''Marsh system'' - based only on villous architecture:<ref name=pmid17544877>{{cite journal |author=Corazza GR, Villanacci V, Zambelli C, ''et al.'' |title=Comparison of the interobserver reproducibility with different histologic criteria used in celiac disease |journal=Clin. Gastroenterol. Hepatol. |volume=5 |issue=7 |pages=838–43 |year=2007 |month=July |pmid=17544877 |doi=10.1016/j.cgh.2007.03.019 |url=}}</ref> | ||
{| class="wikitable" | {| class="wikitable" | ||
| Grade | | Grade | ||
| Similar Marsh grade | |||
| Descriptors | | Descriptors | ||
| Alternate descriptors | | Alternate descriptors | ||
|- | |- | ||
| A | | A | ||
| Marsh 1 | |||
| well-formed villi, IELs > 25/100 enterocytes | | well-formed villi, IELs > 25/100 enterocytes | ||
| normal villous architecture | | normal villous architecture | ||
|- | |- | ||
| B1 | | B1 | ||
| partial villous atrophy | | Marsh 3a | ||
| partial villous atrophy; villous-crypt ratio < 3:1 | |||
| blunted villi | | blunted villi | ||
|- | |- | ||
| | | B2 | ||
| Marsh 3c | |||
| total villous atrophy | | total villous atrophy | ||
| flattened mucosa | | flattened mucosa | ||
|} | |} | ||
Notes: | Notes: |
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