A phase II open label single arm multi-institutional study at Yale's Smilow Cancer Hospital (New Haven, CT, USA), the Smilow Cancer Hospital Care Centers (regional community-based clinics), the VA Connecticut Healthcare System West Haven Campus (West Haven, CT, USA) and Bridgeport Hospital (Bridgeport, CT, USA). The primary objective of this study was to determine the PFS in patients with MPC and LAPC treated with a dose attenuated modification of FOLFIRINOX.