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Chinese Archives of General Surgery(Electronic Edition) ›› 2021, Vol. 15 ›› Issue (02): 131-136. doi: 10.3877/cma.j.issn.1674-0793.2021.02.011

Special Issue:

• Original Article • Previous Articles     Next Articles

Carbohydrate antigen 19-9 level to total tumor volume as a predictor of pancreatic carcinoma recurrence and long-term prognosis after curative resection

Wenli Xu1, Fangfei Wang1, Zhangyong Ren1, Shaocheng Lyu1, Xinxue Zhang1, Lixin Li1, Qiang He1,()   

  1. 1. Department of Hepatobiliary Surgery, Beijing Chaoyang Hospital Affiliated to Capital Medical University, Beijing 100020, China
  • Received:2020-09-04 Online:2021-04-01 Published:2021-04-25
  • Contact: Qiang He

Abstract:

Objective

To evaluate the effect of carbohydrate antigen 19-9 (CA19-9)/total tumor volume (TTV), the ratio of CA19-9 to TTV, as a prognostic marker on tumor recurrence and long-term survival in patients with pancreatic ductal adenocarcinoma (PDAC) following pancreaticoduodenectomy (PD).

Methods

The data of 203 patients who underwent PD for PDAC in Beijing Chaoyang Hospital Affiliated to Capital Medical University from January 2011 to December 2019 were analyzed. Univariate and multivariate analyses were performed of the clinicopathological data to screen out the risk factors affecting long-term prognosis of PDAC. CA19-9/TTV was calculated according to preoperative CA19-9 and TTV, and the ROC curve was drawn based on CA19-9/TTV and 1-year survival, so as to determine the optimal cut-off value of CA19-9/TTV and group criterion. The differences of clinicopathological data and postoperative complications between the two groups were compared to explore their relationship with long-term prognosis in patients with PDAC undergoing PD.

Results

The median overall survival (OS) was 18 months, and the 1-, 3-, and 5-year OS rates were 64.1%, 25.6% and 15.2%, respectively. Tumor differentiation and CA19-9/TTV were independent risk factors for long-term prognosis of PDAC (P=0.002, 0.005). The best cut-off value of ROC curve was 5.62 (area under curve, 0.633; 95% CI: 0.548-0.718). Patients with CA19-9/TTV≤5.62 were labeled as Group 1, and others were Group 2. There was no significant difference in clinicopathological data between the two groups. The median OS in Group 1 and Group 2 was 26 and 15 months respectively, and the 1-, 3- and 5-year OS rates were 82.7%, 40.8%, 24.8% and 57.5%, 19.0%, 11.2%, respectively (P=0.002).

Conclusion

CA19-9/TTV is an independent risk factor for the prognosis of PDAC after PD, which may be a new marker for lower survival benefits.

Key words: Pancreatic neoplasms, Pancreaticoduodenectomy, Carbohydrate antigen 19-9, Total tumor volume, Prognosis

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