IL6 and familial pancreatic carcinoma: The upregulation of IL‐6/gp130 axis was evaluated using tumor‐derived IL‐6 level and intratumoral pSTAT3 expression in N‐inv of murine sciatic nerves by intraneural injection of Capan‐1 cell (N‐inv model) and using resected pancreatic cancer tissue and clinical data from 46 PDAC patients.