Phase II study of neoadjuvant treatment with Gemcitabine, Tarceva and Oxaliplatin followed by chemotherapy with Tarceva and Gemcitabine in patients with pancreatic adenocarcinoma with borderline resectability. The primary objective is to determine the resectability rate of patients with pancreas adenocarcinoma with borderline resectability determined radiologically, treated with Gemcitabine, Tarceva and Oxaliplatin followed by radiotherapy with Gemcitabine and Tarceva.