4. Pre-registration EUS, CT of chest and upper abdomen, and PET must support a clinical stage of T3N0M0, T2-3N1M0 or T2-3N0-1M1a (celiac adenopathy must be ≤ 2 cm by EUS). Clinically staged T1 tumors and T2N0M0 tumors are not eligible. N1 does not require biopsy/FNA. Note: Patients requiring a stent for nutrition must have staging examinations and scans completed before stent placement.