RESUMEN
Objective To investigate the change pattern of perioperative plasma D-dimer levels in patients with lung cancer, and the relationship between plasma D-dimer level and clinical pathological features thereof. Methods A to-tal of 64 patients with lung cancer were taken as cancer group, and 15 cases of benign lung disease were used as control group. The plasma levels of D-dimer were determined 2 days before operation, 1 day, 5 days and 9 days after operation in two groups. The clinical pathological parameters and type of surgery were evaluated at the same time. Results Plasma D-dimer levels were significantly higher in patients with lung cancer than those in control group (t=3.087, P<0.05). D-dimer levels were significantly lower in patients of TNM stageⅠthan those in patients of stageⅡorⅢ(P<0.05, respectively). Plas-ma D-dimer levels were significantly higher in patients with small cell cancer than those of patients with non-small cell can-cer (P<0.05). The perioperative plasma levels of D-dimer changed with time trends (P<0.001). In cancer group, D-dimer levels increased on the first day after operation, and then significantly decreased on the fifth and ninth day after operation (P<0.05). In control group, D-dimer levels increased on the first day after operation. The level of D-dimer was the same lev-el on the fifth day and the first day after operation (P=0.174). The level of 9 days after operation decreased to the level before operation (P=0.631). There was significant difference in overall data between cancer group and control group (P=0.005). D-dimer levels were significantly higher in cancer group than those of control group except for the fifth day after operation. Con-clusion Plasma D-dimer levels were much higher before operation in patients with lung cancer than those of controls. Plas-ma D-dimer levels were associated with TNM stage and cell type. D-dimer levels were significantly increased from the first day after operation, and then decreased significantly until the 9-day after operation, which were lower than that before opera-tionin lung cancer patients. But the level was still higher than that in patients with benign lung diseases.