CD8A and neoplasm: In the entire cohort, dMMR was significantly associated with I-type morphology (p = 0.003), N0-stage (p = 0.002), perineural growth (p = 0.003), absence of tumor growth in lymphatic vessels (p = < 0.001) and in peripancreatic fat (p = 0.002), infiltration of CD8+ T cells (p = 0.035), infiltration of CD56+ cells (p = 0.029) and with no adjuvant chemotherapy (p = 0.040).