OBJECTIVES: I. Determine the feasibility, toxicity, and antitumor effects of active specific intralymphatic immunotherapy with allogeneic pancreatic cancer cells treated with interferon alfa plus low-dose adjuvant systemic sargramostim (GM-CSF) and cyclophosphamide in patients with incurable pancreatic adenocarcinoma. II. Assess the immunologic and biologic correlates of this treatment regimen in these patients.