Abstract
Cholangiocarcinoma (CCA) is a lethal disease. A new predictive factor to identify patients suitable for adjuvant chemotherapy is needed. The relationship between the long-term prognosis and the perioperative immune responses in patients with CCA remains unclear. We therefore investigated the clinical impact of perioperative immune responses on the long-term prognosis in patients receiving hepatectomy for CCA. We investigated 81 patients who underwent hepatectomy between February 2000 and October 2012: 57 intra-hepatic CCA (iCCA) patients and 24 extra-hepatic CCA (eCCA) patients. We checked the postoperative level of C-reactive protein and the numbers of leukocytes. A multivariate analysis of the clinicopathological factors identified 2 significant risk factors for the overall survival: The postoperative maximum number of leukocytes (PNL) among patient factors (P=0.0406) and the TNM-stage among tumor factors (P=0.0059). On evaluating the distribution of each kind of leukocyte with a multivariate analysis, both the postoperative maximum number of neutrophils (PNN) and the postoperative maximum number of eosinophils (PNE) were detected as significant factors among leukocytes (PNN/PNE, P=0.0367/0.0083). In conclusion, the PNL after hepatectomy was significantly associated with the long-term prognosis in patients with CCA. Changes in the numbers of leukocytes after hepatectomy may be a marker on treatment for CCA.
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