Figure 5From: Spontaneous perforation of primary gastric malignant lymphoma: a case report and review of the literature Immunohistochemical staining. The lymphoid nature of these cells was indicated by the strong positive immunohistochemical staining for CD20, CD38, and CD10 and negative staining for CD5. The MIB-1 labeling index was about 80% (×60).Back to article page