Postoperative Delayed Emptying after Total, Subtotal, or Distal Gastrectomy for Gastric Cancer - a Population-based Study

BACKGROUND

To examine the rate of delayed emptying and other 90-day postoperative complications after total, subtotal, and distal gastrectomy for gastric adenocarcinoma in a population-based setting.

METHODS

This study included all patients undergoing total, subtotal, or distal gastrectomy for gastric cancer in Finland in 2005-2016, with follow-up until December 31, 2019. Logistic regression provided odds ratios with 95% confidence intervals of 90-day mortality. Results were adjusted for age, sex, year of surgery, comorbidities, pathological stage, surgical approach, and neoadjuvant therapy.

RESULTS

A total of 2,058 patients underwent total (n=1,227), subtotal (n=450), or distal (n=381) gastrectomy. The rate of delayed emptying was 1.7% vs. 1.3% vs. 2.1% in the whole cohort and 1.6% vs. 1.8% vs. 3.5% in the subgroup analysis of R0 resections, respectively. Resection type was not associated to the risk of delayed emptying. Subtotal gastrectomy was associated with lower risk of major complications and re-operations and distal gastrectomy was associated with lower risk of anastomotic leak.

CONCLUSIONS

The extent of resection did not affect delayed emptying while less postoperative complications were seen after subtotal or distal gastrectomy compared to total gastrectomy.

Calcifications in the descending thoracic aorta predict postoperative anastomotic leakages after esophagectomy for cancer

BACKGROUND

Anastomotic leak is one of the most feared complications of esophagectomy. Previous studies have suggested a potential link between aortic calcifications detected on routine preoperative CT scans and increased risk of anastomotic leak after esophagectomy. This study aims to investigate whether clinicians' assessment of aortic calcifications can predict the occurrence of anastomotic leaks in patients undergoing esophagectomy for cancer.

METHODS

A long-term follow-up was conducted on consecutive patients with esophageal cancer who underwent elective open esophagectomy at a Finnish tertiary hospital. Aortic calcifications were evaluated based on CT scans and categorized on a 0-3 scale reflecting the number of calcifications in the affected segment of the aorta. Reviewers assessing the calcifications were blinded to clinical details and postoperative outcomes.

RESULTS

The study included 97 patients (median age: 64 years and range: 43-78; 20% female), with a median follow-up time of 1307 (2-1540) days. Among them, 22 patients (23%) had postoperative anastomotic leak. We observed a significant association between calcifications in the descending aorta and a higher risk of anastomotic leak (p = 0.007), as well as an earlier occurrence of leak postoperatively (p = 0.013). However, there was no association between aortic calcifications and increased mortality.

CONCLUSIONS

Presence of calcifications in the descending aorta is independently associated with an increased risk of anastomotic leaks following esophagectomy for cancer. Identifying patients at higher risk for this complication could facilitate appropriate pre- and postoperative interventions, as well as enable earlier diagnosis and treatment to mitigate the severity of the complication.

Postoperative Complications After Neoadjuvant Chemotherapy Versus Upfront Surgery in Gastric Adenocarcinoma: A Population-Based Nationwide Study in Finland

BACKGROUND

To date, no large population-based studies have compared complications and short-term outcomes between neoadjuvant chemotherapy and upfront surgery in gastric cancer. More nationwide studies with standardized reporting on complications are needed to enable international comparison between studies. This study aimed to compare postoperative complications between neoadjuvant therapy and upfront surgery after gastrectomy for gastric adenocarcinoma in a population-based setting.

METHODS

This population-based study based on the Finnish National Esophago-Gastric Cancer Cohort included all patients 18 years of age or older undergoing gastrectomy for gastric adenocarcinoma in Finland during 2005-2016. Logistic regression provided odds ratios (ORs) with 95% confidence intervals (CIs), both crude and adjusted for key confounders. Different types of complications were graded based on the Esophagectomy Complications Consensus Group definitions, and major complications were assessed by the Clavien-Dindo scale.

RESULTS

This study analyzed 769 patients. Neoadjuvant chemotherapy did not increase major postoperative complications after gastrectomy for gastric cancer compared with upfront surgery (OR, 1.12; 95% CI 0.81-1.56). Furthermore, it did not increase pneumonia, anastomotic complications, wound complications, or other complications.

CONCLUSIONS

Neoadjuvant therapy is not associated with increased postoperative complications, reoperations, or short-term mortality compared with upfront surgery in gastric adenocarcinoma.

Stapled vs handsewn anastomosis and anastomotic leaks in gastric cancer surgery-a population-based nationwide study in Finland

BACKGROUND

There is a lack of evidence regarding anastomotic technique and postoperative complications in gastric cancer surgery. This study aimed to evaluate whether there are differences between stapled and handsewn anastomosis and anastomotic leaks.

METHODS

This was a population-based, retrospective, nationwide cohort study in Finland using the Finnish National Esophago-Gastric Cancer Cohort. Patients undergoing gastrectomy with available postoperative complication data were included. Logistic regression analysis was used to calculate the odds ratios with 95% CIs, adjusted for calendar period of surgery, age at surgery, sex, comorbidity, tumor stage, neoadjuvant therapy, minimally invasive surgery, type of gastrectomy, radical resection, and type of anastomosis.

RESULTS

Of the 2164 patients, 472 of all patients (21.8%) had handsewn anastomosis and 1692 of all patients (78.2%) had stapled anastomosis. In the unadjusted analysis, anastomotic leaks were significantly lower in the handsewn group (hazard ratio [HR], 0.42; 95% CI, 0.22-0.79) than the stapled group, but after adjustment for known prognostic factors, this association was no longer significant (HR, 0.57; 95% CI, 0.27-1.21). In the analysis stratified by gastrectomy type (distal or total), no differences in anastomotic leaks were observed between anastomotic techniques.

CONCLUSION

In this population-based nationwide study, anastomotic technique (stapled or handsewn) was not associated with anastomotic leaks in any, distal or total, gastrectomy.

Population-based nationwide incidence of complications after gastrectomy for gastric adenocarcinoma in Finland

BACKGROUND

The incidence of postoperative complications after gastrectomy for gastric cancer is not well known. More population-based studies using established complication classifications are needed for international comparison. The aim of this study was to evaluate the population-based incidence of postoperative complications after gastrectomy for gastric cancer.

METHODS

This population-based study based on the Finnish National Esophago-Gastric Cancer Cohort included all patients at least 18 years of age undergoing gastrectomy for gastric adenocarcinoma in Finland during 2005-2016. The occurrence of complications 30 and 90 days after surgery was graded based on the Esophagectomy Complications Consensus Group definitions and the severity of complications was assessed using the Clavien-Dindo scale.

RESULTS

This study included a total of 2196 patients. Postoperative complications occurred in 906 (41.3 per cent) of patients during 30 days after surgery and in 946 (43.1 per cent) during 90 days after surgery. Clavien-Dindo grade III or higher complications occurred in 375 (17.1 per cent) of patients. The most common complications 90 days after surgery by Esophagectomy Complications Consensus Group upper-level categories were gastrointestinal (n = 438; 19.9 per cent), including anastomotic leak, infectious (n = 377; 17.2 per cent) and pulmonary (n = 335; 15.3 per cent) complications. Postoperative mortality rate was occurred in 72 (3.3 per cent) patients within 30 days and in 161 (7.3 per cent) patients within 90 days after surgery. The median duration of postoperative hospital stay was 9 days (interquartile range 4-14).

CONCLUSIONS

Postoperative complications are common across all types of gastrectomy and the majority occur during the first 30 postoperative days. This study informs the patients and caregivers of the expected outcomes of gastrectomy.

Five-year Survival after McKeown Compared to Ivor-Lewis Esophagectomy for Esophageal Cancer: A Population-based Nationwide Study in Finland

OBJECTIVE

The aim of study was to compare overall 5-year survival of esophageal cancer patients undergoing transthoracic esophagectomy with either neck or intrathoracic anastomosis, that is, McKeown and Ivor-Lewis esophagectomy.

BACKGROUND

No national studies comparing long-term survival after McKeown and ivor-Lewis esophagectomies in the West exist.

METHODS

This population-based nationwide study included all curatively intended transthoracic esophagectomies for esophageal adenocarcinoma or squamous cell carcinoma in Finland in 1987 to 2016, with follow-up until December 31, 2019. Cox proportional hazard models provided hazard ratios (HR) with 95% confidence intervals (ci) of all-cause 5-year mortality. The results were adjusted for age, sex, year of the operation, comorbidities, histology, stage, and neoadjuvant treatment. Adjusted model 2 included also tumor location and lymph node yield.

RESULTS

A total of 990 patients underwent McKeown (n = 278) or Ivor-Lewis (n = 712) esophagectomy The observed overall 5-year survival was 43.1% after McKeown, and 45.9% after Ivor-Lewis esophagectomy. McKeown esophagectomy was not associated with the overall 5-year mortality (adjusted HR 1.11, 95% CI: 0.89-1.38), compared to Ivor-Lewis esophagectomy. Additional adjustment for tumor location and lymphadenectomy further attenuated the point estimate (HR 1.06, 95% CI: 0.85-1.33). Surgical approach was not associated with 90-day mortality rate (adjusted HR 1.15, 95% CI: 0.67-1.97).

CONCLUSIONS

This population-based nationwide study suggests that overall 5-year survival or 90-day survival with McKeown and Ivor-Lewis esopha-gectomy for esophageal cancer are comparable.

Immunomodulatory Functions of Adipose Mesenchymal Stromal/Stem Cell Derived from Donors with Type 2 Diabetes and Obesity on CD4 T cells

For adipose stromal/stem cell (ASCs)-based immunomodulatory therapies, it is important to study how donor characteristics, such as obesity and type 2 diabetes (T2D), influence ASCs efficacy. Here, ASCs were obtained from two groups, donors and T2D and obesity (dASCs) or nondiabetic donors with normal-weight (ndASCs), and then cultured with anti-CD3/CD28-stimulated allogeneic CD4 T cells. ASCs were studied for the expression of the immunomodulators CD54, CD274, and indoleamine 2, 3 dioxygenase 1 (IDO) in inflammatory conditions. CD4 T cells cultured alone or in cocultures were assessed to evaluate proliferation, activation marker surface expression, apoptosis, the regulatory T cells (Tregs; CD4 + CD25 high FOXP3 +) frequency, and intracellular cytokine expression using flow cytometry. Modulation of T-cell subset cytokines was explored via ELISA. In inflammatory conditions, the expression of CD54, CD274 and IDO was significantly upregulated in ASCs, with no significant differences between ndASCs and dASCs. dASCs retained the potential to significantly suppress CD4 T-cell proliferation, with a slightly weaker inhibitory effect than ndASCs, which was associated with significantly reduced abilities to decrease IL-2 production and increase IL-8 levels in cocultures. Such attenuated potentials were significantly correlated with increasing body mass index. dASCs and ndASCs comparably reduced CD4 T-cell viability, HLA-DR expression, and interferon-gamma production and conversely increased CD69 expression, the Tregs percentage, and IL-17A production. Considerable amounts of the immunomodulators prostaglandin E2 (PGE2) and IL-6 were detected in the conditioned medium of cocultures. These findings suggest that ASCs obtained from donors with T2D and obesity are receptive to the inflammatory environment and able to modulate CD4 T cells accordingly.

Long-Term Survival After Transhiatal Versus Transthoracic Esophagectomy: A Population-Based Nationwide Study in Finland

BACKGROUND

No population-based studies comparing long-term survival after transhiatal esophagectomy (THE) and transthoracic esophagectomy (TTE) exist. This study aimed to compare the 5-year survival of esophageal cancer patients undergoing THE or TTE in a population-based nationwide setting.

METHODS

This study included all curatively intended THE and TTE for esophageal cancer in Finland during 1987-2016, with follow-up evaluation until 31 December 2019. Cox proportional hazard models provided hazard ratios (HRs) with 95% confidence intervals (CIs) of 5-year and 90-day mortality. The results were adjusted for age, sex, year of operation, comorbidities, histology, neoadjuvant treatment, and pathologic stage.

RESULTS

A total of 1338 patients underwent THE (n = 323) or TTE (n = 1015). The observed 5-year survival rate was 39.3% after THE and 45.0% after TTE (p = 0.072). In adjusted model 1, THE was not associated with greater 5-year mortality (HR 0.99; 95% CI 0.82-1.20) than TTE. In adjusted model 2, including T stage instead of pathologic stage, the 5-year mortality hazard rates after THE (HR 0.87, 95% CI 0.72-1.05) and TTE were comparable. The 90-day mortality rate for THE was higher than for TTE (adjusted HR 0.72; 95% CI 0.45-1.14). In subgroup analyses, no differences between THE and TTE were observed in Siewert II gastroesophageal junction cancers, esophageal cancers, or pN0 tumors, nor in the comparison of THE and TTE with two-field lymphadenectomy. The sensitivity analysis, including patients with missing patient records, who underwent surgery during 1996-2016 mirrored the main analysis.

CONCLUSIONS

This Finnish population-based nationwide study suggests no difference in 5-year or 90-day mortality after THE and TTE for esophageal cancer.

Endoscopic duodenal stenting is efficient, but has higher rate of reoperations than gastrojejunostomy in palliative treatment for gastric outlet obstruction

BACKGROUND

Surgical gastrojejunostomy has traditionally been the palliative treatment of choice for patients with advanced malignancies and gastric outlet obstruction syndrome. Recently, palliative endoscopic duodenal stenting has increased in popularity. We report outcomes after gastrojejunostomy and duodenal stenting when used for palliative indications.

METHODS

Consecutive patients undergoing palliative gastrojejunostomy or palliative endoscopic duodenal stenting in a Finnish tertiary referral center between January 2015 and December 2020 were included. The postoperative outcomes of these two palliative interventions were compared. The main outcome measures were mortality and morbidity, rate of reoperations, postoperative oral intake ability, and length of hospital stay.

RESULTS

A total of 88 patients, 46 (52%) patients underwent palliative gastrojejunostomy and 42 (48%) duodenal stenting. All patients had malignant disease, most typically hepatopancreatic cancer. Nineteen (44%) patients in duodenal stenting group and 4 (8.7%) patients in gastrojejunostomy group required subsequent interventions due to persisting or progressing symptoms (p < 0.001). Median delay until first oral intake was 2 days (1-24) after gastrojejunostomy and 0 days (0-3) after stenting (p < 0.001). Postoperative morbidity was 30% after gastrojejunostomy and 45% after stenting (p < 0.001). Median length of hospital stay was 7 days (1-27) after surgery and 5 days (0-20) after endoscopy (p < 0.001).

CONCLUSIONS

Patients undergoing endoscopic duodenal stenting are more able to initiate rapid oral intake and have shorter hospital stay. On the other hand, there are significantly more reoperations in stenting group. If the patient's life expectancy is short, we recommend stenting, but for patients whose life expectancy is longer, gastrojejunostomy could be a better procedure, for the reasons mentioned above.

Cohort profile: gastric cancer in the population-based, Finnish National Esophago-Gastric Cancer Cohort (FINEGO) Study

PURPOSE

The Finnish National Esophago-Gastric Cancer Cohort (FINEGO) was established with the aim of identifying factors that could contribute to improved outcomes in oesophago-gastric cancer. The aim of this study is to describe the patients with gastric cancer included in FINEGO.

PARTICIPANTS

A total of 10 457 patients with gastric cancer or tumour diagnosis in the Finnish Cancer Registry or the Finnish Patient Registry during 1987-2016 were included in the cohort, with follow-up from Causes of Death Registry until 31 December 2016. All of the participants were at least 18 years of age, and had undergone either resectional or endoscopic mucosal surgery with curative or palliative intent.

FINDINGS TO DATE

Of the 10 457 patients, 90.1% were identified to have cancer in both cancer and patient registries. In all, the median age was 70 at the time of surgery, 54.5% of the patients were men and 64.4% had no comorbidities. Education data were available for 31.1% of the patients, of whom the majority had had <12 years of formal education. Of the 7798 with cancer staging data available, 41.1% had a local cancer. Adenocarcinoma was the most common (94.2%) histological type. Almost all patients underwent open gastrectomy and 214% in hospitals with annual volume of more than 30 gastrectomies per year. A total of 8561 deaths occurred during the study period, of which 6474 were due to oesophago-gastric cancers. The 5-year survival was 34.6% and 5-year cancer-specific survival was 39.7%.

FUTURE PLANS

The data in FINEGO can be currently used for registry-based research but is being expanded by data extraction from patient records and scanning of histological samples from the Finnish biobanks. Initially, we are planning on studies on the national trends in treatment and mortality, and studies on the demographic factors and their influence on survival.

Cohort profile: a nationwide population-based retrospective assessment of oesophageal cancer in the Finnish National Esophago-Gastric Cancer Cohort (FINEGO)

PURPOSE

The Finnish National Esophago-Gastric Cancer Cohort (FINEGO) was established to combine the available registry data with detailed patient information to form a comprehensive, retrospective, population-based research platform of surgically treated oesophageal and gastric cancer in Finland. This cohort profile describes the 2045 surgically treated patients with oesophageal cancer included in the FINEGO cohort.

PARTICIPANTS

Registry data were collected from the National Cancer, Patient, Education and Death Registries from 1 January 1987 to 31 December 2016. All patients over 18 years of age, who had either curative surgery, palliative surgery or salvage surgery for primary cancer in the oesophagus are included in this study.

FINDINGS TO DATE

2045 patients had surgery for oesophageal cancer in the selected time period. 67.2% were man, and the majority had only minor comorbidities. The proportions of adenocarcinomas and squamous cell carcinomas were 43.1% and 44.4%, respectively, and 12.5% had other or missing histology. Only about 23% of patients received neoadjuvant therapy. Oesophagectomy was the treatment of choice and most patients were treated at low-volume centres, but median annual hospital volume increased over time. Median overall survival was 23 months, 5-year survival for all patients in the cohort was 32.9% and cancer-specific survival was 36.5%.

FUTURE PLANS

Even though Finland only has a population of 5.5 million, surgery for oesophageal carcinoma has not been centralised and therefore previously reported results have mostly been small, single-centre cohorts. Because of FINEGO, we now have a population-based, unselected cohort of surgically treated patients, enabling research on national trends over time regarding oesophageal cancer, including patient characteristics, tumour histology, stage and neoadjuvant treatment, surgical techniques, hospital volumes and patient mortality. Data collection is ongoing, and the cohort will be expanded to include more detailed data from patient records and national biobanks.

Finnish National Esophago-Gastric Cancer Cohort (FINEGO) for studying outcomes after oesophageal and gastric cancer surgery: a protocol for a retrospective, population-based, nationwide cohort study in Finland

INTRODUCTION

Surgery for oesophageal and gastric cancers is associated with high morbidity, mortality and poor quality of life postoperatively. The Finnish National Esophago-Gastric Cancer Cohort has been established with the aim of identifying factors that could contribute to improved outcomes in oesophago-gastric cancer.

METHODS AND ANALYSIS

All patients with oesophageal and gastric cancer diagnosed in Finland between 1987 and 2015 will be identified from the Finnish national registries. The Finnish Cancer Registry and Finnish Patient Registry will be used to identify patients that fulfil the inclusion criteria for the study: (1) diagnosis of oesophageal, gastro-oesophageal junction, or gastric cancer, (2) any surgical treatment for the diagnosed cancer and (3) age of 18 or over at the time of diagnosis. Clinical variables and complication information will be retrieved in extensive data collection from the medical records of the relevant Finnish hospitals and complete follow-up for vital status from Statistics Finland. Primary endpoint is overall all-cause mortality and secondary endpoints include complications, reoperations, medication use and sick leaves. Sub-studies will be implemented within the cohort to investigate specific populations undergoing oesophageal and gastric cancer surgery. The initial estimated sample size is 1800 patients with surgically treated oesophageal cancer and 7500 patients with surgically treated gastric cancer.

ETHICS AND DISSEMINATION

The study has been approved by the Ethical Committee in Northern Ostrobothnia, Finland and The National Institute for Health and Welfare, Finland. Study findings will be disseminated via presentations at conferences and publications in peer-reviewed journals.

Impaired gallbladder function in patients after total gastrectomy

BACKGROUND AND AIMS

The incidence of gallstones and gallbladder sludge is higher in patients after total gastrectomy than in general population. Formation of gallstones after gastrectomy is multifactorial. Here, we investigate the changes in gallbladder and biliary tract functions by cholescintygraphy and monitored changes in cholecystokinin (CCK) release in long-term survivors after total gastrectomy for gastric carcinoma.

MATERIAL AND METHODS

Patients had undergone total gastrectomy for gastric carcinoma at least five years ago. The final study population consisted of 25 patients.

RESULTS

Eight patients had undergone cholecystectomy before or at the time of gastrectomy. Gallstone formation was observed in seven of the remaining 17 patients during follow-up (41%). Maximum uptake of radioactivity and gallbladder maximum uptake was significantly delayed in the gastrectomy group than in the control group. There was no significant difference in CCK levels after the overnight fasting and at 60 minutes after stimulation among patients with or without stones in situ compared with healthy volunteers, but 30 minutes after the energy-rich drink patients had higher CCK levels than the control group.

CONCLUSIONS

In gastrectomy patients, technetium isotope visualisation of the gallbladder and time for maximum activity was significantly delayed. This may indicate impaired gallbladder function. On the contrary, CCK release was not impaired.

Quality of life in the long-term survivors after total gastrectomy for gastric carcinoma

BACKGROUND AND OBJECTIVES

Several studies report the health-related quality of life (HRQoL) after total gastrectomy in short term but long-term results have been less published.

METHODS

One hundred and seventy two patients underwent total gastrectomy between years 1987-1999 for gastric carcinoma. In 2005, 30% of them were still alive. The final study population consisted of 25 patients less than 80 years of age, for whom validated control population data were available. The SF-36 and 15D questionnaires were used as QoL instruments. The median follow-up time from surgery was 9.

RESULTS

The study group did not differ significantly in any of the SF-36 sub scores from the normal population controls. There was no significant difference in the total score in 15D but the patients did statistically significantly worse than the normal population controls in sleeping, elimination and distress. There was significant weight loss during the follow up, but this was not associated with any of HRQoL changes.

CONCLUSIONS

This study shows that patients who survived for long-term after total gastrectomy for gastric carcinoma do generally as well as the normal population controls, but depending on the QoL instrument used, may have lower QoL in some sub dimensions.