Figure 3
From: Unusual primary HIV infection with colonic ulcer complicated by hemorrhagic shock: a case report
Biopsy of colonic mucosa adjacent to the ulcer; immunohistochemistry with anti-CD3, -CD4, and -CD8. The colic mucosa is regenerative, with less mucus in the cytoplasm of the epithelial cells. The lamina propria contains some neutrophils, which infiltrate the epithelial cells (arrow), without an increase of mononuclear cells. In this inflamed mucosa, fewer CD4+ cells (arrow) than CD8+ T cells (arrow) are found.