Fig.3
From: Mixed neuroendocrine–non-neuroendocrine neoplasms of the gallbladder: a case report
Histological findings of gallbladder tumor. a Hematoxylin–eosin staining (× 4). Adenocarcinoma component was located on the surface of tumor (red area), whereas neuroendocrine component in the deeper subserosal layer (blue area). b Hematoxylin–eosin staining (× 40). Papillary and tubular adenocarcinoma. c Hematoxylin–eosin staining (× 20). Neuroendocrine tumor cells arranged in nests. d Immunohistochemical staining for chromogranin A (× 20). Immunohistochemical staining revealed positive expression of synaptophysin