- Tumor stage T2N0M0, T3N0M0, T1-3N+M0, or T1-3N0-1M1A as determined by imaging studies performed no greater than 4 weeks prior to registration, and biopsy, where appropriate. Celiac nodal metastasis (M1A disease) was permitted if other eligibility criteria were met. Data from endoscopic ultrasound and endoscopy were required for staging. The following imaging was required: CT scan with IV contrast and PET or PET+CT. If the PET/CT incorporates CT with IV contrast, then a separate CT is not required. If laparoscopy or other relevant procedures were performed, the data were to be incorporated into stage assignment. Any lesion suspicious for metastasis had to have been biopsied to prove eligibility.