Figure 4From: Endocrine tumors of the gastrointestinal tract and pancreas:grading, tumor size and proliferation index do not predict malignant behaviorLymph node metastasis from G1 endocrine tumor as shown in Fig. 1. Ki-67 monoclonal antibody stains nuclei of lymphocytes. The tumor cells are negative. Anti-Ki-67. × 200.Back to article page