CA19-9 decrease and overall survival according to platelet level in patients with metastatic pancreatic cancer.

Abstract

203Background: Several studies have linked a decrease of carbohydrate antigen (CA) 19-9 to lengthened survival in pancreatic cancer. Experimental evidence supported that CA19-9 may be involved in platelet/tumor cell interactions. The object of this study was to correlate a decline in CA19-9 with survival according to platelet level in metastatic pancreatic cancer. Methods: A retrospective analysis of patients with histologically diagnosed metastatic pancreatic cancer was performed. CA19-9 serum concentration and platelet level was measured at baseline and every 6 weeks. Results: Total 174 metastatic pancreatic cancer patients with baseline and week-6 CA19-9 measurements were analyzed. Median follow-up from initial chemotherapy was 29.2 months, and median survival from initial chemotherapy was 6.7 months. Multivariate analyses confirmed an early decrease in CA19-9 concentrations of 25% after two cycles of chemotherapy were associated with a favorable survival compared with patients who did not have a decre...