Mucosa-associated lymphoid tissue lymphoma in the terminal ileum: A case report

Figure 3 Terminal ileum biopsy showing. A: Protein labeling for CD10. Note the negativity of the neoplastic infiltrate, and the positive internal controls of the glandular epithelium and germinal center of a reactional follicle; B: Protein labeling for CD10. Note the negativity of the neoplastic infiltrate and the positive internal controls of the glandular epithelium; C and D: Double labeling of CD20 (brown) and CD3 (red) demonstrating the nature of B lymphocytes of the neoplastic infiltrate. Note that T cells border the neoplastic infiltrate and preferably the epithelium, attesting to its reaction nature; E: Protein labeling for BCL2. Note that the neoplastic infiltrate expresses strongly and the internal negative control in the germinal center of a reactional follicle; F: Strong protein labeling of the neoplastic infiltrate for BCL2