Figure 7: Large bowel biopsy: H&E staining (on the left) shows a moderate lymphogranulocytic and plasmacellular inflammatory infiltration in the lamina propria. CD3 immunostaining (picture on the right) highlights the increase of the intraepithelial Tlymphocytes (IELs). Marked thickening of the sub-epithelial collagen band (arrowhead). Original magnification 200x; inset 400x.