Table 1.

Marsh classification.

stage	Characteristics
0	Normal small bowel
I	Normal villi with increased intraepithelial lymphocytes (> 25 lymphocytes per 100 epithelial cells),
II	Normal villi with crypt hyperplasia
IIIa	Partial villous atrophy
IIIb	Subtotal villous atrophy
IIIc	Total villous atrophy