NCAM1 and pancreatic adenocarcinoma: Paraffin-embedded tissue sections from one primary lung, four primary colon, two primary pancreas adenocarcinomas and four pancreatic adenocarcinoma metastases were analyzed by immunohistochemistry (IHC) with antibodies against CD56 (Novocastra), TCR γδ (Invitrogen) and HLA class I (Abcam).