DISEASE CHARACTERISTICS: Histologically or cytologically confirmed stage II or stage III pancreatic adenocarcinoma that is considered resectable Lesions should be amenable to surgery with curative intent Bidimensionally measurable or evaluable disease No evidence of metastatic disease No clinically detectable third space fluid collections (e.g., ascites or effusions)

PATIENT CHARACTERISTICS: Age: 18 and over Performance status: ECOG 0-2 Life expectancy: Not specified Hematopoietic: WBC at least 3,500/mm3 Platelet count at least 100,000/mm3 Hemoglobin at least 9.5 g/dL Hepatic: Bilirubin no greater than 4 times upper limit of normal (ULN) PTT no greater than 1.5 times control (unless on anticoagulants) Renal: Creatinine no greater than 1.5 times ULN Other: Not pregnant or nursing Fertile patients must use effective contraception No concurrent serious systemic disorders incompatible with study No active infection No second primary malignancy, previously untreated with curative intent or presently active, that would preclude curative resection of the pancreas

PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: No prior chemotherapy for pancreatic carcinoma Endocrine therapy: Not specified Radiotherapy: No prior radiotherapy for pancreatic carcinoma Surgery: See Disease Characteristics Other: At least 1 month since prior investigational agents At least 72 hours since prior anticoagulant therapy, cholesterol-lowering agents (e.g., lovastatin), high dosage vitamins, or antioxidants No concurrent anticoagulants except for the sole purpose of central line patency maintenance No other concurrent investigational agents