Figure 6.
Immunohistochemical analysis of the resected pancreatic tumor. (A) Cytokeratin-7, a marker for adenocarcinomas of the pancreas, was strongly positive in nearly all the tumor cells. In the same lesion, neuroendocrine markers, (B) chromogranin A and (C) synapthophysin, were positive. (D) The Ki67 index was particularly high.