Abstract:Objective To investigate the changes of levels of serum pepsin and heat shock protein 70 (HSP70) during perioperative period of duodenal tumor resection and their clinical significance. Methods A total of 42 patients with duodenal malignancies were selected. Tumor stage and 2-year survival rate were collected. Serum pepsin I, pepsin Ⅱ and HSP70 levels in patients with different tumor stage and survival prognosis were compared. Relationship between serum pepsin I, pepsin Ⅱ and HSP70 levels and the tumor stage and survival prognosis were analyzed, and application value in predicting survival and prognosis of patients were analyzed. Results Compared with the preoperative, postoperative 7d serum pepsin I, pepsin Ⅱ and HSP70 levels were decreased (P < 0.05). Compared patients with stage Ⅰ, perioperative levels of serum pepsin I, pepsin Ⅱ and HSP70 in patients with stage Ⅱ and Ⅲ were increased (P < 0.05). And compared with the survival patients, perioperative serum pepsin I, pepsin Ⅱ and HSP70 levels in death patients were increased (P < 0.05). Logistic analysis showed that the levels of serum pepsin I, pepsin Ⅱ and HSP70 during perioperative period of duodenal tumor resection were correlated with TNM stage and survival prognosis (P < 0.05). ROC curve analysis showed high sensitivity and high specificity of levels of serum pepsin I, pepsin Ⅱ and HSP70 levels during perioperative period of duodenal tumor resection to predict the prognosis. Conclusions Levels of serum pepsin and HSP70 decrease after duodenal tumor resection, and are correlated with tumor stage and survival prognosis, and may be used as reference index for evaluating the state of illness and prognosis.