Expression of neural cell adhesion molecule in pancreatic cancer.

Neural cell adhesion molecule (NCAM) has been found to be a significant factor for survival in various solid tumors. In the present study, we examined the expression of NCAM in exocrine tumors of the pancreas by immunohistochemistry, using two monoclonal antibodies against NCAM and polysialic acid (MAB735). Expression of NCAM was seen mainly in the cytoplasm of the following cells: regenerating duct cells among neoplastic tissue, hyperplastic islet cells, intrapancreatic nerves and ganglia, as well as tumor cells. There was no reactivity with MAB735. We found a significant correlation between intense NCAM expression (i.e., expression in more than 50% of all tumor cell mass) and survival rates in tubular adenocarcinoma, particularly moderately differentiated tumors (p < 0.05). There was no statistically significant relation between NCAM reactivity and tumor stage or any of the clinicopathologic parameters described by the Japan Pancreas Society (p > 0.05). We conclude that the expression of NCAM in tubular adenocarcinoma of the pancreas, particularly in moderately differentiated tumors, has a significant impact on the overall patient survival.