Idiopathic myointimal hyperplasia of the mesenteric veins affecting the small intestine alone: A case report and review of literature

Figure 4 Microscopic observation of lesions. A: Small intestinal villous atrophy with extensive pyloric gland metaplasia, submucosal fibrous tissue proliferation, and infiltration of lymphocytes, plasma cells, and granulocytes in both the mucosa and submucosa, with focal abscess formation and approximately 15 eosinophils per high-power field. No typical granulomatous lesions were observed on the slide [hematoxylin & eosin (H&E) 20 ×]; B: Irregular proliferation of smooth muscle cells in mesenteric veins, eccentric hyperplasia (H&E 100 ×); C: Mesenteric vein intimal hyperplasia (arrow), lumen stenosis, no thrombus, and no obvious abnormality in the accompanying artery (triangle) (H&E 100 ×).