Chemotherapy, Interferon Alfa, and Radiation Therapy in Treating Patients Who Have Undergone Surgery For Pancreatic Cancer

OBJECTIVES: Primary * Determine the overall survival of patients with previously resected pancreatic adenocarcinoma treated with postoperative cisplatin, interferon alfa, fluorouracil, and concurrent radiotherapy. * Determine the toxic effects of this regimen in these patients. Secondary * Determine the disease-specific, biochemical failure-free, and symptom/treatment-free survival of patients treated with this regimen. * Determine the quality of life of patients treated with this regimen. OUTLINE: * Chemoradiotherapy: Patients receive fluorouracil intravenous (IV) continuously and interferon alfa subcutaneously (SQ) 3 times per week (total of 17 doses) on days 1-19 and 29-45 and cisplatin IV over 6 hours on days 1, 8, 15, 29, 36 and 43. Patients also undergo concurrent radiotherapy once daily, 5 days a week in weeks 1-3 and 5-7 (28 fractions). * Post-chemoradiotherapy fluorouracil: Patients receive fluorouracil IV continuously on days 71-108 and 127-168. PROJECTED ACCRUAL: A total of 44 patients will be accrued for this study.