A case of collagenous gastritis: endoscopic and endocytoscopic features

Fig. 3 Advanced imaging of the nodular mucosa showing: a-c on narrow-band imaging, with and without magnification, glandular widening, with glandular atrophy around the nodules; d-f on endocytoscopy, gland lumens that appear slit-like. Fig. 4 Histopathologic appearance on: a hematoxylin and eosin (H&E) staining, showing a thickened subepithelial collagen layer with associated inflammatory cell infiltration in the lamina propria; b Masson's trichrome staining, showing positivity (blue); c SMA staining, showing positivity of the smooth muscle cells; d desmin staining, showing positivity of the smooth muscle cells. These authors contributed equally.