Boost GVAX Pancreas Vaccine With or Without CY in Patients With Pancreas Cancer

Cohort 1 (J0810 Arm B), Cohort 3, Cohort 4, and Cohort 5 patients will receive 200mg/m\^2 CY administered IV on day 0 of each Cycle (every 6 months). Cohort 2 patients will receive 200mg/m\^2 CY administered IV on Day 0 of the first 3 cycles (every 28 days) and Day 0 of subsequent Cycles (every 6 months).

Cohort 1 patients (J0810 Arm C) will receive 50mg oral CY once a day starting 28 days prior to GVAX and for 28 days post-GVAX (every 6 months).

Cohort 1, 3, 4, and 5 patients will receive GVAX on day 1 of each Cycle (every 6 months). Cohort 2 patients will receive GVAX on Day 1 of the first 3 cycles (every 28 days) and Day 1 of subsequent Cycles (every 6 months).