Prognosis and Efficacy of Laparoscopic Surgery on Patients with Endometrial Carcinoma: Systematic Evaluation and Meta-Analysis

Ma, Jiong; Zhou, Chunxia; Chen, Jinyan; Chen, Xuejun

doi:https://doi.org/10.1155/2022/9384134

Computational and Mathematical Methods in Medicine

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Abstract Introduction Methods Results Discussion Data Availability Conflicts of Interest Authors’ Contributions Acknowledgments References Copyright Related Articles

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Machine Learning and Network Methods for Biology and Medicine 2022

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Research Article | Open Access

Volume 2022 | Article ID 9384134 | https://doi.org/10.1155/2022/9384134

Prognosis and Efficacy of Laparoscopic Surgery on Patients with Endometrial Carcinoma: Systematic Evaluation and Meta-Analysis

Jiong Ma,¹Chunxia Zhou,¹Jinyan Chen,¹and Xuejun Chen¹

Academic Editor: Tao Huang

Received18 Jul 2022

Revised26 Aug 2022

Accepted31 Aug 2022

Published22 Sept 2022

Abstract

Objective. The prognosis and efficacy of laparoscopic surgery (LPS) and open surgery or robotic surgery (RS) on endometrial carcinoma (EC) patients were compared. Methods. Data as of May 2021 were retrieved from databases like PubMed, Embase, Cochrane Library, and Web of Science. The study involved randomized controlled trials (RCTs), cohort studies, or case-control studies for comparing the effects of LPS and open surgery or robotic surgery (RS) on EC treatment. The primary outcomes included duration of operation, blood loss, length of stay (LOS), postoperative complications, and recurrence rate. Secondary outcomes included 3-year progression-free survival (PFS) rate/disease-free survival (DFS) rate and 3-year overall survival (OS) rate. Results. A total of 24 studies were involved, and all of them were cohort studies except 1 RCT and 1 case-control study. There was no significant difference in duration of operation between LPS and open surgery (, 95% CI: -0.37 to 0.25) or RS (, 95% CI: -1.27 to 0.96). In comparison with the open surgery, LPS remarkably reduced blood loss (, 95% CI: -0.58 to -0.29), LOS (, 95% CI: -0.92 to -0.50), and the complication occurrence rate (, 95% CI: 0.73 to 0.95). However, LPS and RS saw no difference in blood loss (, 95% CI: -0.77 to 0.79). Besides, in comparison with RS, LPS prominently shortened the LOS (, 95% CI: 0.12 to 0.40) but increased the complication occurrence rate (, 95% CI: 1.57 to 1.92). In contrast to open surgery or RS, LPS saw no difference in occurrence rate (, 95% CI: 0.56 to 1.01; , 95% CI: 0.62 to 1.53), 3-year PFS/DFS (, 95% CI: 0.90 to 1.09; , 95% CI: 0.87 to 1.96), and 3-year OS (, 95% CI: 0.91 to 1.04; , 95% CI: 0.91 to 1.60). Conclusion. In sum, LPS was better than open surgery, which manifested in the aspects of less blood loss, shorter LOS, and fewer complications. LPS, therefore, was the most suitable option for EC patients. Nevertheless, LPS had no advantage over RS, and sufficient prospective RCTs are needed to further confirm its strengths.

1. Introduction

Endometrial carcinoma (EC) is the most commonly diagnosed gynecologic malignant tumor, especially in some developed countries [1], whose 5-year survival rate was 34.7% (445805 cases) [2]. The risk factors of EC include early menarche, delay menopause, diabetes, polycystic ovarian syndrome (PCOS), metabolic syndrome, current treatments with tamoxifen, and obesity [3–5]. With the increase of risk factors such as aging of population and obesity, the morbidity of EC will continue to rise. Most EC patients who are diagnosed in the early stages (Federation Internationale of Gynecologie and Obstetrigue (FIGO) stage I or II) have better prognoses [6].

Surgeries remain the major treatment for early EC, which mainly include vaginal surgery, laparotomy (LT), or open surgery, laparoscopic surgery (LPS), and robotic surgery (RS). Clinical practice guideline and multiple clinical trials indicate that minimally invasive surgery (MIS) is recommended as the preferred surgical approach for EC patients [7, 8]. In the past, LT has always been the first choice for early EC patients. Since the first report of LPS on EC in 1993 [9], LPS, as a MIS, has become increasingly popular in the treatment of EC [10, 11]. In contrast to open surgery, LPS is characterized by less blood loss, less renascent adhesion and lower morbidity [12]. RS is a new MIS developed on the basis of LPS. Previous studies show that RS for EC treatment results in a shorter length of stay (LOS), less blood loss, lower conversion rate of open surgery, and lower occurrence rate of intraoperative damage to surrounding organs, compared to LPS [13, 14]. However, in contrast to LPS, RS prolongs operation and recovery time [15, 16]. Recently, a multicenter retrospective study compared the therapeutic efficacy of LPS and radical abdominal hysterectomy on early EC patients. The result indicated a decrease in the disease-free survival (DFS) of patients who underwent LPS [17]. However, a prospective study validated that LPS could dramatically improve the short- and long-term quality of life (QOL) of EC patients [18]. Hence, this study systematically evaluated the prognosis and efficacy of LPS.

Consequently, we conducted a meta-analysis to elucidate the prognosis and effect of LPS on EC by comparison with open surgery or RS from the perspective of perioperative results, postoperative complications, recurrence rate, and survival time. This effort will bring insight into the surgical treatment of EC patients.

2. Methods

2.1. Literature Retrieval

The study was performed in adherence to the Preferred Reporting Items for Systematic reviews and Meta-Analyses (PRISMA) statement [19]. All relevant literature included in the databases like PubMed, Embase, Cochrane Library, and Web of Science were retrieved from the construction of the databases to May 2021. Keywords used for searching included “endometrial carcinoma,” “hysteroscopic surgery,” “minimally invasive surgery,” “laparoscopic surgery,” “robotic surgery,” and “open surgery.” The detailed strategy of literature retrieval was as follows: ((((Endometrial Neoplasm[MeSH Terms]) OR (Endometrial Carcinoma[MeSH Terms])) OR (Endometrial Cancer[MeSH Terms])) AND (((((Laparoscopy[Title/Abstract]) OR (Hysteroscope[Title/Abstract])) OR (Minimally invasive[Title/Abstract])) OR (Open[Title/Abstract])) OR (robotic[Title/Abstract]))) AND ((operation[Title/Abstract]) OR (surgery[Title/Abstract])).

2.2. Selection of Studies

Inclusion criteria of the literature were as follows: (1) patients diagnosed with EC; (2) comparison between effects of LPS and open surgery or RS on EC treatment; (3) at least one of the results such as duration of operation, blood loss, LOS, postoperative complications, recurrence rate, 3-year progression-free survival (PFS) rate/DFS rate, and 3-year overall survival (OS) rate was reported; and (4) study was designed as RCT, cohort study, or case-control study. The following were the exclusion criteria of the literature: (1) repeated publication, case series, case report, comments, meeting abstract, review, editorial, letter, and so on; (2) data were not sufficient to obtain the result of our study; (3) article replications; and (4) studies lack of efficacy-related data.

2.3. Data Extraction and Quality Assessment

The information obtained from the literature included the information of the authors, publication year, country, study design, the year the samples were collected, the number of samples, and intervening measures. Data of the patients included age, body mass index (BMI), FIGO stage, pathological grading, and outcome indicator. Primary outcomes included duration of operation, blood loss, LOS, and postoperative complications. Secondary outcomes involved postoperative recurrence rate, 3-year PFS rate/DFS rate, and 3-year OS rate.

Cochrane risk of bias assessment tool was employed to assess the quality of RCT which was graded as “low risk,” “high risk,” and “uncertain risk.” Besides, the Newcastle-Ottawa Scale (NOS) was utilized to evaluate the risk of publication bias in observational studies. Aggregate points of NOS were 9, and literature with the points greater than or equal to 6 was considered of good quality.

The search and selection of articles and the extraction and quality evaluation of data were independently finished by two investigators. Disputes were solved by the third investigator through consultation.

2.4. Statistical Analysis

Meta-analysis was performed using the Stata 16.0 software. Continuous data were expressed as (SD). Mean difference (MD) was measured via continuous results, and 95% confidence intervals (CIs) were used to assess the concrete therapeutic effect. If CI included 0, it denoted no statistical difference between two groups. Besides, two-category data were merged and analyzed utilizing relative risk (RR) and their 95% CI. If CI included 1, it indicated no statistical difference between two groups. statistic was applied to assess the statistical heterogeneity of studies involved. A random effect model was used if or , suggesting a remarkable heterogeneity. Otherwise, a fixed effect model was used.

3. Results

3.1. Screening and Selection of Reports

A total of 1666 reports were retrieved based on the established searching strategies, among which 224 reports were excluded. Further, 1400 reports were excluded by scanning their title and abstract. After reading the full text of the remaining 42 reports, 7 reports of them reported unrelated data while 11 of them lacked sufficient data for obtaining the result of our study. Finally, 24 reports were selected for our study [13, 20–42]. The procedures of report screening are shown in Figure 1.

3.2. Characteristics of the Studies and Quality Evaluation

A total of 24 reports were involved in the study, in which 6814 patients underwent LPS and 5315 patients underwent open surgery. Besides, 6121 patients underwent RS. Except for 1 RCT and 1 case-control study, the other reports were cohort studies. All characteristics of reports involved and the results of quality assessment are displayed in Table 1. Papers with the points greater than or equal to 6 were of high quality.

3.3. Results of Meta-Analysis

3.3.1. Duration of Operation and Blood Loss

In respect of the operation time, 9 studies compared that in LPS and open surgery (), and 2 studies compared that in LPS and RS (). Due to huge heterogeneity, a random effect model was introduced for analysis. The outcome of meta-analysis suggested that there was no significant difference in duration of operation between LPS and open surgery (, 95% CI: -0.37 to 0.25) or RS (, 95% CI: -1.27 to 0.96) (Figures 2(a) and 2(b)).

(a)

(b)

In respect of blood loss, 6 studies compared that in LPS and open surgery (), and 2 studies compared that in LPS and RS (). Based on the results of heterogeneity analysis, a fixed effect model and a random effect model were employed, respectively. The result of meta-analysis demonstrated that the blood loss of LPS was dramatically decreased in contrast to open surgery (, 95% CI: -0.58 to -0.29), but it had no remarkable difference when compared with that of RS (, 95% CI: -0.77 to 0.79) (Figures 3(a) and 3(b)).

(a)

(b)

3.3.2. Postoperative LOS, Complications, and Recurrence Rate

In respect of LOS, 5 studies compared that in LPS and open surgery (), and 2 studies compared that in LPS and RS (). Based on the results of heterogeneity analysis, a random effect model and a fixed effect model were employed, respectively. It was exhibited in meta-analysis that the LOS of LPS was shorter than that of open surgery (, 95% CI: -0.92 to -0.50) (Figure 4(a)). Meanwhile, the LOS of RS was shorter by comparison with that of LPS (Figure 4(b)).

(a)

(b)

In respect of postoperative complications, 15 studies compared that in LPS and open surgery (), and 8 studies compared that in LPS and RS (). Due to huge heterogeneity, a random effect model was employed. As demonstrated in the result of meta-analysis, LPS resulted in a decrease in the occurrence rate of complications relative to open surgery (, 95% CI: 0.73 to 0.95) (Figure 5(a)) but an increase in that compared to RS (, 95% CI: 1.57 to 1.92) (Figure 5(b)).

(a)

(b)

In respect of recurrence rate, 7 studies compared that in LPS and open surgery (), and 3 studies compared that in LPS and RS (). Because of small heterogeneity, a fixed effect model was employed. According to the result of meta-analysis, there was no notable difference in recurrence rate between LPS and open surgery (, 95% CI: 0.56 to 1.01) or RS (, 95% CI: 0.62 to 1.53) (Figures 6(a) and 6(b)).

(a)

(b)

3.3.3. The 3-Year PFS/DFS and OS

In respect of 3-year PFS/DFS, 2 studies compared that in LPS and open surgery (), and 3 studies compared that in LPS and RS (). Based on the heterogeneity analysis, a fixed effect model and a random effect model were employed, respectively. The outcome of meta-analysis indicated an insignificant difference in 3-year PFS/DFS between LPS and open surgery (, 95% CI: 0.90 to 1.09) or RS (, 95% CI: 0.87 to 1.96) (Figures 7(a) and 7(b)).

(a)

(b)

In respect of 3-year OS, 3 studies compared that in LPS and open surgery (), and 4 studies compared that in LPS and RS (). Based on the results of heterogeneity analysis, a fixed effect model and a random effect model were employed, respectively. As shown in the result of meta-analysis, there was no prominent difference in 3-year OS between LPS and open surgery (, 95% CI: 0.91 to 1.04) or RS (, 95% CI: 0.91 to 1.60) (Figures 8(a) and 8(b)).

(a)

(b)

4. Discussion

This study found that LPS did not improve the survival time of patients. A retrospective study compared the clinical effect of LPS and open surgery on the treatment of low risk EC patients (grade 1 or 2 EC and ). The result suggested that the 5-year recurrence-free survival (RFS) and OS of LPS were similar to those of open surgery [43]. Besides, another study reported the 5-year survival rate of EC patients who underwent LPS, open surgery, or RS, suggesting that there was no significant difference in 5-year DFS and OS of patients [44]. In addition, a multicenter database study verified that the long-term prognosis of MIS on treatment of high-risk EC was no worse than that of LT [45]. The above results were in agreement with the outcome of our study, which indicated that LPS did not dramatically improve the 3-year PFS/DFS and OS of patients.

Generally, LPS takes longer time on operation [36]. However, our study manifested that there was no significant difference in duration of operation between LPS and open surgery or RS. Importantly, since the duration of operation would be subjected to the skill of the operator, we could not figure out which method was the most potential to reduce the duration of operation among these surgeries. Meanwhile, the blood loss of LPS was obviously lower than that of open surgery, but it had no remarkable difference in comparison with that of RS.

The LOS of LPS was notably shorter than that of open surgery and LPS also resulted in fewer postoperative complications. However, RS was overwhelmingly better than LPS in the aspect of duration of time and postoperative complications. This study suggested that no obvious difference in recurrence rate was found between LPS and open surgery or RS.

A previous meta-analysis has proved that uterine manipulator is irrelevant to an increase in occurrence rate of positive peritoneal cytology, lymphovascular space invasion, or recurrence in EC patients [46]. Our study only investigated conventional LPS. A recent meta-analysis involved 4 RCTs that compared the clinical effect of laparoendoscopic single-site surgery (LESS) and conventional LPS on the treatment of EC patients, which suggested an insignificant difference between the two surgeries. Meanwhile, LESS only has advantage on reducing trauma [47]. Additionally, another meta-analysis that was similar to our study compared the differences between RS and LPS or open surgery. The analysis suggested that RS was characterized by less blood loss and blood transfusion, fewer postoperative complications, and less conversion to LT plus shorter LOS compared with the other two surgeries. However, RS took a longer time on operation in surgical staging of EC [48]. Interestingly, these results were consistent with the outcomes of our study. Moreover, we also analyzed the oncological outcome of EC patients.

This study presented some advantages. Firstly, our meta-analysis involved some recent clinical trials with a vast number of samples. Furthermore, we also analyzed the survival time of patients. But few samples were involved in the analysis, which was a limitation of our study.

Inevitably, there were limitations in this study. First of all, most of the studies involved in our study were retrospective cohort studies which are inherently subjected to the risk of selection bias. Secondly, the speculation about whether various risk factors affect the prognosis of EC patients who underwent LPS is needed to be further verified. In addition, Cusimano et al. [49] performed a meta-analysis on EC patients with obesity who underwent LPS or robotic hysterectomy. The result of the analysis revealed that LPS and robotic hysterectomy had similar incidence of perioperative complications. However, robotic hysterectomy may reduce conversions due to the positional intolerance of patients suffering from morbid obesity. Finally, because of the lack of related reports on 5-year survival time of patients, we only analyzed the 3-year PFS/DFS and OS of the patients.

In summary, our study revealed that LPS was a safe and effective treatment for EC patients, which was better than open surgery. Nevertheless, LPS was at a disadvantage in the comparison with RS on duration of operation and postoperative complications. In the future, more randomized trials with complete data are needed to verify our conclusion.

Data Availability

The data used to support the findings of this study are included within the article. The data and materials in the current study are available from the corresponding author on reasonable request.

Conflicts of Interest

The authors declare no conflicts of interest.

Authors’ Contributions

Jiong Ma and Xuejun Chen wrote the main manuscript text, and Chunxia Zhou and Jinyan Chen prepared Figures 1–8. All authors reviewed the manuscript.

Acknowledgments

This study was financially supported by the Zhejiang Medical and Health Science and Technology Plan Project (2014KYA244) and the National Natural Science Foundation of China Youth Science Fund Project (81202064)

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Copyright © 2022 Jiong Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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