In a study conducted on TILs expanded from a pancreatic cancer, it was shown that more than 50% of CD8+ pancreatic TILs were positive for IFN-γ expression, while greater than 70% of CD8+ TILs were capable of producing either CD107a or IFN-γ when stimulated. The gene discussed is IFNG; the disease is familial pancreatic carcinoma.