Nivolumab in Combination With Chemotherapy Pre-Surgery in Treating Patients With Borderline Resectable Pancreatic Cancer

Inclusion Criteria: * Histologically confirmed pancreatic adenocarcinoma * One of the following: * Borderline resectable disease. There are multiple definitions of borderline resectable pancreatic ductal adenocarcinoma (PDAC) including the MD Anderson definition and the criteria developed during the Consensus Conference sponsored by the American Hepato-Pancreato-Biliary Association, Society of Surgical Oncology, and Society for Surgery of the Alimentary Tract. Borderline resectable PDAC cases will be identified per the definition developed in the currently running inter-group pilot trial for borderline resectable pancreatic cancer (NCT01821612). Per this trial, borderline resectable PDAC is defined as the presence of any one or more of the following on computed tomography (CT): * An interface between the primary tumor and the superior mesenteric vein or portal vein (SMV-PV) measuring \>= 180 degrees of the circumference of the vessel wall * Short-segment occlusion of the SMV-PV with normal vein above and below the level of obstruction that is amenable to resection and venous reconstruction * Short segment interface (of any degree) between tumor and hepatic artery with normal artery proximal and distal to the interface that is amenable to resection and reconstruction * An interface between the tumor and superior mesenteric artery (SMA) measuring \< 180 degrees of the circumference of the vessel wall * Performance status of Eastern Cooperative Oncology Group (ECO…