Fig. 5From: Large-cell neuroendocrine carcinoma of the common bile duct: a case report and a review of literatureImmunohistochemical findings in the component of LCNEC. a Immunostaining for synaptophysin was partially positive. b Immunostaining for chromogranin A was negative. c Immunostaining for CD56 was strongly positive in most of the LCNEC cells. d Immunostaining for Ki-67 was strongly positive in 72% of the LCNEC cellsBack to article page