Extensive idiopathic mesenteric phlebosclerosis presenting as intestinal pseudo-obstruction: A case report

Figure 3 Endoscopic biopsy samples of the left colon. A: Endoscopic biopsy pathology images showing inflammatory cell infiltration and the deposition of powdery fibrin in the lamina propria (yellow arrow, × 400), fibrous thickening of the wall (black arrow, × 400) of small vessels, a cellulose-like substance (blue arrow, × 400) in the submucosa; B: Calcification surrounding the mesenteric vein (black arrow, × 200).