Fig. 4From: Successful resection of a neuroendocrine tumor in the gallbladder: a case reportDefinitive diagnosis of a neuroendocrine tumor of the gallbladder relies on the pathological results. a, b Hematoxylin and eosin staining of the gallbladder tumor. Immunohistochemical staining showed positivity for c chromogranin A, d synaptophysin, and e CD56. f The Ki-67 index was < 3%Back to article page