Figure 4

Histology and immunohistochemical phenotyping of IELs (at 150 cm in jejunum) 6 months after starting GFD. Intraepithelial lymphocytosis (IEL), 40 lymphocytes/100 enterocytes with double positivity for CD3 (LEFT) and CD8 (RIGHT), and negative for CD4; consistent with Marsh I classification.