Prospective Cohort of Patients Treated Using Neoadjuvant Modified FOLFIRINOX 6 Cycles for Potentially Resectable Pancreatic Duct Adenocarcinoma, Candidate for Participation in the PANACHE02 Clinical Trial

In relation with the primary objective the primary endpoint of the PANACHE02 screening cohort study is the success for the complete therapeutic sequence defined by the administration of at least 4 cycles of neoadjuvant modified FOLFIRINOX following by pancreatic tumor resection and at least one cycle of adjuvant treatment.

A patient evaluable for the primary endpoint is a patient for whom we the success or the failure of the complete therapeutic sequence.

A patient in success for the complete therapeutic sequence is a patient with an administration of at least 4 cycles of neoadjuvant modified FOLFIRINOX following by pancreatic tumor resection and at least one cycle of adjuvant treatment.

A patient in failure for the complete therapeutic sequence is a patient with an administration of less than 4 cycles of neoadjuvant modified FOLFIRINOX and/or no resection and/or no adjuvant treatment administration.

Overall survival; OS will be calculated from the date of diagnosis to the date of death from any cause. Alive patients will be censored at the last date known to be alive, either during study treatment period or during follow-up period.

extraction of ctDNA, then quantification by fluorimetry before being analyzed by digital PCR (dPCR)

Event-free survival (EFS) was used to evaluate the time to failure since diagnosis. A failure is defined as progression before surgery, unresectable or metastatic disease at surgical exploration and recurrence or death whatever occurred first after surgery. Alive patients with no failure will be censored at the last date known to be alive with no failure events, either during study treatment period or during follow-up period.

Assess several methods to quantify tumor response and its prognostic value. If pertinent and reproducible, the best method may better select the patients most likely to beneficiate from a chemotherapy switch than the pTNM stage. Different approaches will be compared to refine the identification of good/bad responders.

For patients resected, Disease Free Survival (DFS), is defined as the time from complete surgical resection to first documented event (cancer relapse, second malignancy, or death, whichever occurred first), or until last contact if no event occurs. Patients lost to follow-up were censored at last follow-up visit.

Rate of patients with access to adjuvant treatment

Safety and will be measured by the incidence and grade of AEs, SAEs, according to NCI-CTCAE v 5.0

Overall morbidity evaluated with DINDO-CLAVIEN at 30 days and 90 days post operatively The Clavien Dindo classification scale consists of several grades ranging from a postoperative event not requiring medical treatment Grade I to death Grade V (Grade I, II, IIIa, IIIb, IVa, IVb and V)

Surgical morbidity and mortality rates are evaluated with DINDO-CLAVIEN at 30 days and 90 days post operatively The Clavien Dindo classification scale consists of several grades ranging from a postoperative event not requiring medical treatment Grade I to death Grade V (Grade I, II, IIIa, IIIb, IVa, IVb and V)

size, T stage; resection margins, criterion R; lymph node invasion, N stage

complete neoadjuvant sequence correspond to mFOLFIRINOX Cycles + curative surgery

(EORTC QLQ-C30 and QLQ-PAN26 questionnaires)