Fig. 2
From: Primary intracranial neuroendocrine tumor: two case reports
The pathological results of the first patient. a, b Specimen was comprised of different size cells with distinct atypia and proliferated actively. (HEA 100×, B 200×). c–e Tumor cells were immunohistochemical positive for Syn (c), ChrA (d), and CK8 (e). f The Ki-67-labeling index was more than 90 % in the atypical cells. (IHC 100×)