Pancreatic cancer represents the fourth cause of death by cancer in western countries. The only curative treatment is surgery but this one is possible only in 10 to 15 % of cases. To date, there are few biomarkers in circulating blood as prognostic or diagnostic markers in pancreatic cancer. The purpose of this study is to determine if the pancreatic tumor mobilization during its resection impacts the quantity of circulating tumor DNA in peripheral and portal blood.

The investigators will analyze if the tumor mobilization increases circulating DNA rate in peripheral and portal blood. Moreover, circulating tumor DNA will be measured during 12 months after surgery in peripheral blood. They will use a gene mutation detection technique called Next Generation Sequencing (NGS) which is more specific than a simple Polymerase Chain Reaction (PCR).

Inclusion Criteria:

• Every patient taken care by Toulouse University Hospital for the resection of a non-metastatic pancreatic adenocarcinoma by whipple resection.
• Patient aged over 18 years old
• Patient having given his written consent
• Patient with social insurance coverage

Exclusion Criteria:

• Patients who had surgery, but their pathological examination of the resected specimen does not contain adenocarcinoma.
• Patient for whom the surgery was not realized (exploratory laparotomy)