Comparison of Standard D2 and Limited Lymph Node Dissection in Elderly Patients with Advanced Gastric Cancer

Risk factors for postoperative pancreatic fistula (POPF) in gastric cancer patients: A systematic review and meta-analysis

BACKGROUND

Postoperative pancreatic fistula (POPF) is a common and serious consequence of gastrectomy. The prevalence of POPF among patients with gastric cancer varies greatly, and the risk factors and outcomes of POPF are also controversial. The meta-analysis aims to comprehensively assess the risk factors for POPF in gastric cancer patients.

METHODS

PubMed, Web of Science, the Cochrane Library, Embase, and Chinese databases (SinoMed, CNKI, WanFang, and VIP Databases) were searched to identify relevant studies (from inception to May 2023). Two researchers evaluated the literature quality and extracted data individually. The Review Manager 5.4 program was used to analyze all of the data.

RESULTS

In our meta-analysis, 22 studies totaling 11,647 patients were analyzed. Male sex (OR = 3.06), older age (OR = 3.22), body mass index (BMI) ≥ 25 kg/m2 (OR = 2.58), visceral fat area (VFA) ≥ 100 cm2 (OR = 3.65), pTNM Ⅲ-Ⅳ (OR = 2.47), the number of lymphlode dissections (OR = 1.04), neoadjuvant chemotherapy (NAC) (OR = 2.91), the application of LigaSure (OR = 3.30), open surgery (OR = 3.23), intraoperative combined organ resection (OR = 4.11), drainage amylase concentration on the first postoperative day (OR = 5.73) and C-reactive protein on the 3rd postoperative day ≥20 mg/dL (OR = 7.29) were the risk factors for POPF in gastric cancer patients. On the other hand, the operation time (OR = 1.34) was not a risk factor for POPF.

CONCLUSION

The frequency of POPF in people undergoing gastrectomy was determined by a variety of risk factors. Medical professionals should identify risk factors early and impose interventions to prevent them to lower the incidence of POPF in gastric cancer patients.

Differences of clinical features and outcomes between male and female elderly patients in gastric cancer

Although the average life span differs between males and females, little is known about differences in clinical features and short and long-term outcomes between elderly male and female gastric cancer patients. This study was designed to clarify these issues to identify the possibility for sex-based treatment strategies in elderly gastric cancer patients. This study included 295 consecutive elderly gastric cancer patients (75 years or older) who underwent curative gastrectomy between 1997 and 2016. We defined postoperative complications as Clavien-Dindo classification grade II or higher. Comorbidities were present in 67% of all patients. Males tended to have more comorbidities than females (P = 0.077). Male patients had significantly more upper gastric cancers (P = 0.001), a higher incidence of postoperative complications (P = 0.045), and poorer prognoses than females (P = 0.003). Multivariate analysis revealed that being male was an independent risk factor for postoperative complications (Odds ratio 2.5, P = 0.045) and a poor prognostic factor (Hazard ratio 1.81, P = 0.008). Patients who underwent limited surgery without postoperative complications tended to have a better prognosis than patients receiving standard surgery with postoperative complications (3-year overall survival: 78% vs. 55%, P = 0.156). Male was an independent risk factor for postoperative complications and an independent poor prognostic factor in elderly gastric cancer patients. To avoid postoperative complications, the limited surgery might be justified for high-risk elderly male patients.

Analysis of risk factors affecting long-term survival in elderly patients with advanced gastric cancer

BACKGROUND

Factors predicting postoperative complications after gastrectomy for elderly patients with gastric cancer have been analyzed in several previous studies. However, there is limited research available on risk factors related to long-term survival.

AIMS

This study aimed to analyze factors affecting long-term survival after curative gastrectomy in elderly patients with advanced gastric cancer.

METHODS

This study included patients aged > 75 years with histologically confirmed advanced gastric cancer stage II or greater. Before analysis, risk factors were categorized into four groups: baseline characteristics, underlying diseases, surgical and pathologic factors, and nutritional factors.

RESULTS

The mean follow-up duration was 71.0 months. The 5-year overall survival and disease-specific survival rates were 51.5% and 58.3%, respectively. Kaplan-Meier curves showed that patients who were female and overweight had significantly longer survival rates than those who were male and underweight. Elderly patients who underwent a total gastrectomy had poorer survival rates than those who underwent a distal gastrectomy. Multivariate analysis demonstrated that tumor stage, extent of gastrectomy, overweight status and overall complication were independent risk factors for overall survival.

DISCUSSION

Our study show that the overweight patients, the extent of gastrectomy, tumor stage and overall complications are significant risk factors affecting long-term survival.

CONCLUSIONS

Therefore, surgeons may be cautious in performing total gastrectomy in elderly gastric cancer patients. Additionally, it is important to focus on improving nutritional status and mitigating overall complications.

Efficacy of indocyanine green fluorescence imaging-guided lymphadenectomy in radical gastrectomy for gastric cancer: A systematic review and meta-analysis

Background

Indocyanine green (ICG) imaging-guided lymphadenectomy has been introduced in gastric cancer (GC) surgery and its clinical value remains controversial. The aim of this study is to evaluate the efficacy of ICG fluorescence imaging-guided lymphadenectomy in radical gastrectomy for GC.

Methods

Studies comparing lymphadenectomy in radical gastrectomy between use and non-use of ICG fluorescence imaging up to July 2022 were systematically searched from PubMed, Web of Science, Embase and Cochrane Library. A pooled analysis was performed for the available data regarding the baseline features, the number of retrieved lymph nodes (LNs), the number of metastatic LNs and surgical outcomes as well as oncological outcomes. RevMan 5.3 software was used to perform the statistical analysis. Quality evaluation and publication bias were also conducted.

Results

17 studies with a total of 2274 patients (1186 in the ICG group and 1088 in the control group) undergoing radical gastrectomy and lymphadenectomy were included. In the pooled analysis, the baseline features were basically comparable. However, the number of retrieved LNs in the ICG group was significantly more than that in the control group (MD = 7.41, 95% CI = 5.44 to 9.37, P < 0.00001). No significant difference was found between the ICG and control groups in terms of metastatic LNs (MD = -0.05, 95% CI = -0.25 to 0.16, P = 0.65). In addition, the use of ICG could reduce intraoperative blood loss (MD = -17.96, 95% CI = -27.89 to -8.04, P = 0.0004) without increasing operative time (P = 0.14) and overall complications (P = 0.10). In terms of oncological outcomes, the use of ICG could reduce the overall recurrence rate (OR = 0.50; 95% CI 0.28-0.89; P = 0.02) but could not increase the 2-year overall survival rate (OR = 1.25; 95% CI 0.72-2.18; P = 0.43).

Conclusions

ICG imaging-guided lymphadenectomy is valuable for complete LNs dissection in radical gastrectomy for GC. However, more high-quality randomized controlled trials are needed to confirm this benefit.