Fig. 2From: A novel second-stage surgical strategy for severely obese patient with pancreatic neuroendocrine tumor: a case reportHistopathological findings of EUS-FNA. a Hematoxylin–eosin stain revealed that small round monotonous cells were formed into rosette-like aggregation. b Immunohistochemical staining showed that the tumor cells were positive for synaptophysin. c Ki-67 proliferation index was around 1%. All scale bars are presenting 200 μm in every pictureBack to article page