Diverse phenotypic manifestations of small intestinal mucosa in non-infectious common variable immunodeficiency bowel disease: A case report

Figure 5 HE staining of small intestinal mucosa. A and B: The villous structure becomes blunt, the crypt structure extends, and the number of lymphocytes in the surface epithelium increases, but the number of plasma cells in the lamina propria decreases or is missing; C and D: Increased intraepithelial and intrinsic membrane lymphocytes, with some showing focal lymphocyte proliferation.