Figure 3. Endoscopic duodenal mucosal biopsy showing mucosal “flattening” with a sub-epithelial band-like deposit typical of collagenous sprue. Increased numbers of intra-epithelial lymphocytes are present and apparent detachment of surface epithelial cells are seen. A trichrome stain for collagen was positive.

From

Olmesartan-Induced Collagenous Sprue

Hugh James Freeman

International Journal of Celiac Disease. 2020, 8(1), 32-34 doi:10.12691/ijcd-8-1-6