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Chinese Journal of Clinicians(Electronic Edition) ›› 2024, Vol. 18 ›› Issue (09): 826-835. doi: 10.3877/cma.j.issn.1674-0785.2024.09.005

• Evidence-based medicine • Previous Articles     Next Articles

Impact of preoperative chemotherapy on prognosis of pseudomyxoma peritonei treated by cytoreductive surgery plus hyperthermic intraperitoneal chemotherapy:a meta-analysis

Ying Zhang1,2, Xin Zhao3, Jiamei Chen4, Yan Li2,5,()   

  1. 1.Department of Oncology, Daxing Teaching Hospital, Capital Medical University, Beijing 102600, China
    2.Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital,Capital Medical University, Beijing 100038, China
    3.Department of Colorectal Surgery, Beijing Anorectal Hospital, Beijing 100120, China
    4.Center of Oncology, Renmin Hospital of Wuhan University, Wuhan 430060,China
    5.Department of Surgical Oncology, Beijing Tsinghua Changgung Hospital, Tsinghua University,Beijing 102218, China
  • Received:2024-08-01 Online:2024-09-15 Published:2025-01-13
  • Contact: Yan Li

Abstract:

Objective

To investigate the impact of preoperative chemotherapy on the prognosis of pseudomyxoma peritonei (PMP) treated by cytoreductive surgery (CRS) plus hyperthermic intraperitoneal chemotherapy (HIPEC).

Methods

A literature search was conducted on cohort studies on the effects of preoperative chemotherapy on the prognosis of PMP from PubMed, Embase, Cochrane Library, CNKI,and Wanfang Database. The literature was screened according to the inclusion and exclusion criteria, and quality evaluation and data extraction were carried out. RevMan5.4 and Stata15.1 software were used for statistical analyses. The outcome indicators were overall survival (OS), progression-free survival, and disease-free survival (DFS).

Results

Seventeen articles were included in the meta-analysis. Fourteen articles reported the impact of preoperative chemotherapy on OS. The results of meta-analysis showed that the OS of the preoperative chemotherapy group was shorter than that of the non-preoperative chemotherapy group(hazard ratio [HR]=1.58, P<0.00001). Stratified analysis showed that in patients with pathological types of high-grade tumors and high-grade tumors with signet ring cells, the OS of the preoperative chemotherapy group was shorter than that of the non-preoperative chemotherapy group (HR=1.62, P<0.00001). The OS of the preoperative chemotherapy group in Caucasian race was shorter than the non-chemotherapy group in Caucasian race (HR=1.65, P<0.001), but there was no statistically significant difference in the Asian race.Seven articles reported the impact of preoperative chemotherapy on PFS. The results showed that the PFS of the preoperative chemotherapy group was shorter than that of the non-chemotherapeutic group (HR=1.62,P<0.001). Stratified analysis showed that in patients with pathological types of high-grade tumors and highgrade tumors with signet ring cells, the PFS of the preoperative chemotherapy group was lower than that of the non-chemotherapeutic group, but the difference was not statistically significant (HR=1.24, P=0.31). In both Asian and Caucasian races, the PFS of preoperative chemotherapy group was declined (HR=1.53 and 1.71,P=0.003 and 0.0002, respectively). Sensitivity analysis and publication bias test both suggested stable results.

Conclusion

Preoperative chemotherapy has no OS and PFS benefit for PMP patients receiving CRS + HIPEC treatment. Because all the included studies are retrospective, and the possible important confounding factors such as baseline information, pathological types, and chemotherapy regimens had not been investigated in more detail, more stringent prospective studies are warranted for further verification.

Key words: Cytoreductive surgery, Hyperthermic intraperitoneal chemotherapy, Pseudomyxoma peritonei, Preoperative chemotherapy

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