Primary Neuroendocrine Tumor in Brain

Figure 4

(a) Photomicrograph showing the tumor filled with necrosis. (H&E stain, original magnification ×20. Bar: 1000 μm.) MIB-1 index, 37%. (b) Photomicrograph showed a large number of cells with nuclear atypia around the vessels. (H&E stain, original magnification ×100. Bar: 100 μm.) (c) Chromogranin stain is positive. (Original magnification ×200. Bar: 100 μm.) (d) Synaptophysin stain is positive. (Original magnification ×200. Bar: 100 μm.)

(a)

(b)

(c)

(d)