Table I. Characteristics of patients and tumors.
ECOG: Eastern Cooperative Oncology Group; well: well differentiated adenocarcinoma; mod: moderately differentiated adenocarcinoma; SBRT: stereotactic body radiotherapy; CEA: carcinoembryonic antigen, CA19-9: carbohydrate antigen 19-9; GTV: gross tumor volume; fx: fractions; BED: biologically effective dose.