Mucosal healing progression after acute colitis in mice

Figure 2 Histological examination of longitudinal and transversal colonic sections stained either with hematoxylin-and-eosin or with Periodic-acid Schiff. Magnification: 10 ×. A: Colon sections of the control mice at day 0 and dextran sodium sulfate-treated mice at days 7, 10, 13 and 28 (Blue arrow: Focal ulceration accompanied by fibrin; Circle: Clusters of neutrophils within mucosa and submucosa; Green arrow: Transmural increase of mononuclear cells; Pink arrow: Clear space due to of edema; Yellow arrow: Cyst formation; Red arrow: Mucosal lymphocytosis; Green rectangle: Crypt architectural disarray and crypt abscess; Grey arrow: Edema; Orange arrow: Multifocal ulceration; Violet arrow: Focal re-epithelization); B: Histological illustration of Periodic-acid Schiff staining during time. Scale bar: 100 µm.