Patients receive FOLFIRINOX regimen comprising irinotecan hydrochloride intravenously (IV) over 90 minutes, oxaliplatin IV over 120 minutes, leucovorin calcium IV over 120 minutes, and fluorouracil IV over 1-2 minutes and then continuously over 46 hours on day 1. Treatment repeats every 14 days for 6 courses in the absence of disease progression or unacceptable toxicity.