Progression-free Survival After MWA Plus Durvalumab and Tremelimumab for Unresectable Locally Advanced Pancreatic Cancer

Research Hypothesis Does MIS-MWA combined with durvalumab (MEDI4736) plus tremelimumab and gemcitabine prolong progression-free survival in patients with unresectable non-metastatic adenocarcinoma of the pancreas? Investigational Product(s) and Reference Therapy: Combination of Durvalumab (fixed dose of 1500 mg) and Tremelimumab (fixed dose of 75 mg) will be given 2 weeks before surgery. Minimally invasive surgical microwave ablation (MIS-MWA) of the pancreatic tumor will be performed two weeks after the first dose of Durvalumab and Tremelimumab After 4 doses of Durvalumab and Tremelimumab, only Durvalumab 1500mg is provided q4w until disease progression. Systemic gemcitabine will be started 6 weeks after MIS-MWA. Gemcitabine will be given at a dose of 1000 mg /m² body surface, once a week for 3 weeks, followed with a week of rest. Objectives: Primary Objectives: Progression-free survival (PFS) Secondary Objectives: * Safety: clinical and hematological toxicity (NCI CTCAE v. 5.0) of chemotherapy and immunotherapy * Safety: number and type of postoperative complications of the MIS-MWA procedure * Length of hospital stay Tertiary Objectives Overall survival (OS)