- cT clinical depth of tumor invasion, R resectable, BR borderline resectable, pT pathological depth of tumor invasion, pN pathological lumph node metastasis, Ph pancreas head, Pb pancreas body, Pt pancreas trail, CRT chemoradiation therapy, NLR neutrophil-to lymphocyte ratio, PN prognostic nutritional index, PD pancreatoduodenectomy, PD distal pancreatecomy