The same area of appendix tissue (Figure 7) from different immunostaining slides was selected to show the co-expression of CD31 (A, a, a’) and FSHR (B, b, b’) in endothelial cells of capillaries growing in neuroendocrine tumors (green arrows) and into peritumoral (red arrows) areas. Here, FSHR is linked to neuroendocrine neoplasm.