Fig. 4
From: Primary intracranial neuroendocrine tumor: two case reports
The pathological results of the second patient. a, b The tumor was comprised of small round cells with uniform nuclei and scant cytoplasm. (HEA 100×, B 400×) c The Ki-67-labeling index was less than 1 %. d–f Electron micrographs showed that neuroendocrine granules (NEGs) were occasionally observed. (D 10,000×, E 20,000×, F 25,000×)