Laparoscopic colorectal cancer surgery combined with enhanced recovery after surgery protocol (ERAS) reduces the negative impact of sarcopenia on short-term outcomes

The Impact of Sarcopenia on Postoperative Outcomes in Colorectal Cancer Surgery: An Updated Systematic Review and Meta-Analysis

Sarcopenia is thought to be a marker for underlying frailty and malnutrition, contributing to poor functional status and suboptimal healing postoperatively. We aimed to complete an updated systematic review and meta-analysis evaluating the impact of sarcopenia on short- and long-term outcomes following colorectal cancer surgery. We searched MEDLINE, Embase, and CENTRAL up to September 2023. Studies that compared sarcopenic and non-sarcopenic patients' short- and long-term outcomes following curative intent elective surgery for colorectal cancer were included. The main outcomes included postoperative morbidity, postoperative mortality, and length of stay (LOS), among others. Inverse variance random effects meta-analyses was performed. Risk of bias was assessed with Cochrane tools. Certainty of evidence was assessed with GRADE. After screening 215 studies, we included 40 non-randomized studies, totalling 13,422 patients, of which 5,432 (40.4%) were classified as sarcopenic. Across 27 studies, patients with sarcopenia were more likely to experience 30-day postoperative morbidity (40% vs 33%, RR 1.30, 95% CI 1.12-1.50, P < 0.01, I2 79%). The mean LOS was 1.46 days longer for sarcopenic patients (26 studies, 95% CI 0.85-2.07, P < 0.01, I2 82%). Upon pooling data from 13 studies, sarcopenic patients had increased risk of 30-day postoperative mortality (2.8% vs 1.0%, RR 2.74, 95% CI 1.63-4.62, P < 0.01, I2 0%). The findings from this systematic review suggest with low to very-low certainty evidence that in patients who are undergoing curative intent surgery for colorectal cancer, preoperative sarcopenia is associated with poor postoperative outcomes.

Postoperative changes in body composition after laparoscopic and open resection of colorectal liver metastases: data from the randomized OSLO-COMET trial

BACKGROUND

Low muscle mass is negatively associated with survival in patients undergoing surgery for colorectal cancer. Current evidence is limited regarding whether the surgical approach for liver resection of colorectal metastasis impacts postoperative changes in body composition and whether preoperative body composition can impact complication rate and survival.

METHOD

This study included patients previously included in the randomized OSLO-COMET trail where patients was allocated to laparoscopic or open liver resection for colorectal liver metastasis. CT scans 0-3 months before and 2-6 months after liver resection were segmented with the artificial intelligence-based tool BodySegAI to measure skeletal muscle mass (SM), visceral adipose tissue (VAT), and inter- and intramuscular adipose tissue (IMAT). SM, VAT and IMAT was compared between the open and laparoscopic group and as predictors for 5-year survival and postoperative complications.

RESULTS

This study included 216 patients, median age was 67, 127 (59%) were male, 91 (42%) had primary tumor in rectum and 86 (40%) had multiple liver metastasis. There was no significant difference in postoperative change in SM, VAT or IMAT between those undergoing laparoscopy or open surgery. In multivariate analysis, high preoperative IMAT was a predictor for increased risk of postoperative complications (HR (95% CI): 1.045 (CI 95%: 1.003-1.089), p = 0.034). Moreover, postoperative increase in IMAT was a negative predictor for 5-year survival (HR (95%CI):1.009 (1.003-1.016), p = 0.003).

CONCLUSION

Postoperative change in body composition did not differ between patients randomly assigned to open or laparoscopic liver resection for colorectal metastasis. High preoperative IMAT was associated with an increased risk of postoperative complications.

Sarcopenia as a Prognostic Factor for the Outcomes of Surgical Treatment of Colorectal Carcinoma

Background/Objectives: Sarcopenia, defined as the progressive loss of muscle mass and function, is increasingly associated with worse outcomes in the surgical treatment of colorectal cancer (CRC). This paper focuses on analyzing the impact of sarcopenia as a prognostic factor on postoperative outcomes in CRC patients. The aim of the study is to identify the main factors influencing postoperative results. This will be accomplished via bibliometric analysis and highlighting the significance of muscle condition in the preoperative assessment of patients. Methods: The methodological approach involves analyzing bibliographic data from relevant scientific databases focused on sarcopenia and oncological surgery. The study employs a quantitative analysis of citations and collaborations among authors and institutions. The focus will be on research publications from 2013, when we first identified references to sarcopenia in the examined context. Results: The results show that sarcopenia significantly increases the risk of postoperative morbidity and mortality in CRC patients. Network analysis and keyword mapping reveal dominant research topics such as muscle condition, mortality, and postoperative complications. Meanwhile, we identify the need for standardized diagnostic methods for sarcopenia and their integration into clinical practice to improve predictive models and clinical approaches. Conclusions: These findings underscore the importance of interdisciplinary collaboration, preoperative assessment of muscle condition, and the implementation of standardized approaches to improve clinical outcomes for patients.

Preoperative Prediction of Sarcopenia in Patients Scheduled for Gastric and Colorectal Cancer Surgery

INTRODUCTION

Sarcopenia negatively impacts surgical outcomes in gastrointestinal cancer patients, yet practical preoperative screening tools are lacking. The CRP/ALB ratio, a novel biomarker of systemic inflammation and nutritional status, may enhance sarcopenia prediction but remains underexplored in surgical oncology. This study aims to identify the predictors for preoperative sarcopenia prediction in gastric and colorectal cancer patients.

METHODS

This retrospective study analyzed 145 patients undergoing curative surgery (2019-2021). Sarcopenia was defined by sex-specific CT-measured L3 skeletal muscle index (cutoffs, male ≤ 40.8 cm2/m2; female ≤ 34.9 cm2/m2). Multivariable logistic regression identified predictors, with model performance assessed via ROC analysis and Cohen's Kappa.

RESULTS

The cohort (median age 64 years; 73.8% male) comprised 66 gastric (45.5%) and 79 colorectal (54.5%) cancer patients, with 29 (20%) diagnosed with sarcopenia. Sarcopenic patients exhibited a higher NRS 2002 score (P < 0.001), lower PNI score (P < 0.05), and higher CRP/ALB ratio (P < 0.05). Multivariate logistic regression analysis results showed that CRP/ALB ratio (OR = 3.084, 95% CI 1.071-8.882, P = 0.037), age (OR = 1.074, 95% CI 1.021-1.130, P = 0.006), and BMI (OR = 0.667, 95% CI 0.542-0.820, P = 0.000) were associated with the increased risk of sarcopenia. The combined model achieved superior discrimination (AUC = 0.854, 95% CI 0.770-0.937), yielding 75.86% sensitivity and 84.82% specificity at optimal cutoff value - 1.0340, and a Cohen's Kappa coefficient of 0.542 when compared to CT results.

CONCLUSION

The CRP/ALB ratio combined with BMI and age is utilized as a convenient and effective tool for preoperative sarcopenia screening. This model-driven approach provides robust strategies to facilitate preoperative interventions, optimize perioperative care, and enhance long-term oncological outcomes for patients undergoing gastric and colorectal cancer surgery.

Minimal invasive surgery protects against severe postoperative complications regardless of body composition in patients undergoing colorectal surgery

BACKGROUND

For many colorectal cancer patients, primary surgery is the standard care of treatment. Further insights in perioperative care are crucial. The aim of this study is to assess the prognostic value of body composition for postoperative complications after laparoscopic and open colorectal surgery.

METHODS

From January 2013 to 2018 all consecutive patients who underwent surgery for colorectal cancer were enrolled in this study. Patients with a preoperative CT-scan <90 days before surgery were included. All CT-scans were obtained retrospectively, and body composition was analysed using a single transverse slice at the level of the third lumbar vertebra (L3) within the Slice-O-Matic-software. The studied outcome measure was the occurrence of major postoperative complications (Clavien-Dindo grade ≥3b).

RESULTS

A total of 1213 patients were included in the final analyses. Multivariable analyses showed that patients with low-skeletal muscle mass Z-score (OR 0.67, 95 % CI 0.45-0.97, p = 0.036) or a high visceral adipose tissue Z-score (OR 1.56, 95 % CI 1.06-2.29, p = 0.023) were significantly associated with an increased risk of developing major postoperative complications after open surgery. In the laparoscopic group, all six body composition parameters were not significantly associated with an increased risk of developing a major postoperative complication.

CONCLUSIONS

In this study, open colorectal surgery in patients with either low skeletal muscle mass or high visceral adipose tissue mass was associated with increased risk of postoperative complications. Laparoscopic surgery did not show this correlation. This demonstrates the importance of using minimal invasive surgery in colorectal cancer patients and implementing this as standard care.

Geriatric Approaches to Rectal Cancer: Moving Towards a Patient-Tailored Treatment Era

Rectal cancer is a significant global health concern, particularly amongst the elderly population, with rectal cancer accounting for approximately one-third of cancer cases in this population. Older adults often present with advanced disease stages and unique clinical manifestations, such as tumors closer to the anal verge and with greater size. Diagnosis typically involves a series of screening and imaging strategies, culminating in accurate staging through pelvic MRI, endoscopic ultrasound, and CT scan. Management of rectal cancer in older adults emphasizes individualized treatment plans that consider both the cancer stage and the patient's overall health status, including frailty and comorbidities. A multidisciplinary approach, including a mandatory geriatric assessment, is essential for optimizing outcomes, in order to improve survival and quality of life for elderly patients with rectal cancer.

Predictors of perioperative morbidity in elderly patients undergoing colorectal cancer resection

AIM

Colorectal cancer resection in the elderly may be associated with significant morbidity. This study aimed to assess perioperative morbidity in elderly patients undergoing colorectal cancer resection and to investigate risk factors for postoperative complications.

MATERIALS AND METHODS

Consecutive patients aged ≥ 75 years undergoing colorectal cancer resection with curative intent between January 2014 and December 2021 at our institution were included. We evaluated risk factors for postoperative complications, length of hospital stays (LOS), 30-day readmission, and 90-day mortality rates.

RESULTS

A total of 843 patients underwent colorectal cancer resection during the study period, of whom 202 patients were 75 years or older. Advanced age was associated with postoperative complications (Clavien-Dindo score > 3b, p = 0.001). Sarcopenia, preoperative plasma albumin < 3.5 g/dL, and open and urgent surgery were significantly correlated with major complications (p = 0.015, p = 0.022, p = 0.003, and p < 0.001, respectively). LOS was longer in elderly patients with a modified 5-item Frailty Index (5-mFI) ≥ 2 and low preoperative serum albumin levels, as well as following open surgery (p = 0.006, p = 0.001 and p < 0.001, respectively). Sarcopenia and preoperative plasma albumin < 3.5 g/dL were predictors for 90-day mortality (p = 0.004 and p > 0.001).

CONCLUSION

Advanced age, sarcopenia, preoperative hypoalbuminemia, 5-mFI ≥ 2, and open or urgent surgery may serve as predictors for postoperative morbidity in the elderly population.

High Prevalence of Sarcopenia in Patients with Newly Diagnosed Gastroenteropancreatic Neuroendocrine Tumours (GEP-NETs), but No Association with the Risk of Surgical Complications

Background: Sarcopenia is a muscle disease that occur across a lifetime. It is commonly described in the aging population but can occur earlier in life in patients with cancer. Previous studies demonstrated sarcopenia is highly prevalent in patients with gastroenteropancreatic neuroendocrine tumours (GEP-NETs). In solid organ cancers, such as colorectal or pancreatic cancer, the presence of sarcopenia is associated with surgical complications. It is unknown if sarcopenia in patients with GEP-NETs is a risk factor for surgical complications. Methods: A multicentre retrospective study was performed in patients with a recently diagnosed GEP-NET and surgery to the primary tumour. CT scans were analysed for body composition analyses to assess for the presence of sarcopenia. Data regarding surgical procedures and complications were collected. Any major surgical complication was considered as Clavien-Dindo score ≥ 3. Results: This study included 180 patients, with 83 being male (46%) with a median age of 62 years (IQR 54-69). Most patients (n = 138, 77%) had a small intestinal NET, while 36 patients (20%) had pancreatic NETs. Sarcopenia was present in 109 patients (61%). In 43 patients (24%), surgical complications were recorded, and 21 complications (49%) were considered as major. Any type of surgical complication was not statistically different between patients without sarcopenia (n = 17, 24%) and with sarcopenia (n = 26, 24%)-a p-value of 0.36. This was the same for major complications; between patients without sarcopenia (n = 5, 24%) and with sarcopenia (n = 16, 76%)-a p-value of 0.18. Conclusions: Sarcopenia is highly prevalent in patients with a recently diagnosed GEP-NET, but this is not associated with major surgical complications. Future studies should include pathophysiological mechanisms that could be used to identify the causes of sarcopenia, its effect on quality of life and other oncological outcomes.

Evolving concepts on perioperative nutrition of sarcopenic cancer patients

The recent recognition of the association of sarcopenia with an increased risk of complications after a surgical procedure calls for rethinking the proper approach of the perioperative care in cancer patients. Sarcopenia is broadly considered in literature according to three different definitions: loss of muscle mass, loss of muscle mass plus reduced muscle function and myosteatosis. The aim of this short review on this issue is to define the excess of risk by type of primary and of surgical procedure, depending on the definition of sarcopenia, to speculate on this association (casual versus causal) and to examine the current therapeutical approaches. The analysis of the data shows that sarcopenia, defined as loss of muscle mass plus reduced muscle function, has the higher predictive power for the occurrence of postoperative complications than the two other definitions, and any definition of sarcopenia works better than the usual indexes or scores of surgical risk. Our analysis supports the concept that: a) sarcopenia is frequently associated with inflammation, but inflammation cannot be considered the only or the absolute cause for sarcopenia, b) sarcopenia is not a simple marker of risk but can have a direct role in the increase of risk. Data on perioperative care of sarcopenic cancer patients are scanty but a correct approach cannot rely on nutritional support alone but on a combined approach of optimized nutrition and exercise, hopefully associated with an anti-inflammatory treatment. This strategy should be applied proactively in keeping with the recent recommendations of the American Society of Clinical Oncology for the medical treatment of advanced cancer patients even if a clear demonstration of effectiveness is still lacking.

The impact of perioperative fluid therapy on the short-term outcomes after laparoscopic colorectal cancer surgery with ERAS protocol: a prospective observational study

The main goals of the Enhanced recovery after surgery (ERAS) protocol are focused on shortening the length of hospital stay (LOS), expediting convalescence, and reducing morbidity. A balanced perioperative fluid therapy is among the significant interventions incorporated by the ERAS protocol. The article contains extensive discussion surrounding the impact of this individual intervention on short-term outcomes. The aim of this study was to assess the impact of perioperative fluid therapy on short-term outcomes in patients after laparoscopic colorectal cancer surgery. The analysis included consecutive patients, who had undergone laparoscopic colorectal cancer operations between 2013 and 2020. Patients were divided into two groups: restricted (≤ 2500 ml) or excessive (> 2500 ml) perioperative fluid therapy. A standardized ERAS protocol was implemented in all patients. The study outcomes included recovery parameters and the morbidity rate, LOS and 30 days readmission rate. There were 361 and 80 patients in groups 1 and 2, respectively. There were no statistically significant differences between the groups in terms of demographic parameters and factors related to the surgical procedure. Logistic regression showed that restricted fluid therapy as a single intervention was associated with improvement in tolerance of diet on 1st postoperative day (OR 2.18, 95% CI 1.31-3.62, p = 0.003), accelerated mobilization on 1st postoperative day (OR 2.43, 95% CI 1.29-4.61, p = 0.006), lower risk of postoperative morbidity (OR 0.58, 95%CI 0.36-0.98, p = 0.046), shorter LOS (OR 0.49, 95% CI 0.29-0.81, p = 0.005) and reduced readmission rate (OR 0.48, 95% CI 0.23-0.98, p = 0.045). A balanced perioperative fluid therapy on the day of surgery may be associated with faster convalescence, lower morbidity rate, shorter LOS and lower 30 days readmission rate.

Impact of sarcopenia on outcomes in surgical patients: a systematic review and meta-analysis

BACKGROUND

Surgeons have historically used age as a preoperative predictor of postoperative outcomes. Sarcopenia, the loss of skeletal muscle mass due to disease or biological age, has been proposed as a more accurate risk predictor. The prognostic value of sarcopenia assessment in surgical patients remains poorly understood. Therefore, the authors aimed to synthesize the available literature and investigate the impact of sarcopenia on perioperative and postoperative outcomes across all surgical specialties.

METHODS

The authors systematically assessed the prognostic value of sarcopenia on postoperative outcomes by conducting a systematic review and meta-analysis according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines, searching the PubMed/MEDLINE and EMBASE databases from inception to 1st October 2022. Their primary outcomes were complication occurrence, mortality, length of operation and hospital stay, discharge to home, and postdischarge survival rate at 1, 3, and 5 years. Subgroup analysis was performed by stratifying complications according to the Clavien-Dindo classification system. Sensitivity analysis was performed by focusing on studies with an oncological, cardiovascular, emergency, or transplant surgery population and on those of higher quality or prospective study design.

RESULTS

A total of 294 studies comprising 97 643 patients, of which 33 070 had sarcopenia, were included in our analysis. Sarcopenia was associated with significantly poorer postoperative outcomes, including greater mortality, complication occurrence, length of hospital stay, and lower rates of discharge to home (all P <0.00001). A significantly lower survival rate in patients with sarcopenia was noted at 1, 3, and 5 years (all P <0.00001) after surgery. Subgroup analysis confirmed higher rates of complications and mortality in oncological (both P <0.00001), cardiovascular (both P <0.00001), and emergency ( P =0.03 and P =0.04, respectively) patients with sarcopenia. In the transplant surgery cohort, mortality was significantly higher in patients with sarcopenia ( P <0.00001). Among all patients undergoing surgery for inflammatory bowel disease, the frequency of complications was significantly increased among sarcopenic patients ( P =0.007). Sensitivity analysis based on higher quality studies and prospective studies showed that sarcopenia remained a significant predictor of mortality and complication occurrence (all P <0.00001).

CONCLUSION

Sarcopenia is a significant predictor of poorer outcomes in surgical patients. Preoperative assessment of sarcopenia can help surgeons identify patients at risk, critically balance eligibility, and refine perioperative management. Large-scale studies are required to further validate the importance of sarcopenia as a prognostic indicator of perioperative risk, especially in surgical subspecialties.

Computed tomography-assessed presarcopenia and clinical outcomes after laparoscopic surgery for rectal cancer

PURPOSE

Previous studies have reported that presarcopenia negatively affects rectal cancer treatment. However, most studies have analyzed patients including majority of open surgery, and the association between presarcopenia and clinical outcomes after laparoscopic rectal cancer surgery remains unclear. This study aimed to evaluate the impact of presarcopenia on the clinical and oncological outcomes after laparoscopic rectal cancer surgery.

METHODS

Three hundred and one patients undergoing laparoscopic rectal cancer surgery between December 2009 and May 2016 were enrolled. Body composition was assessed using computed tomography by measuring the muscle and fat areas at the third lumbar (L3) vertebra. The L3 skeletal muscle area was used to calculate the skeletal muscle index and evaluate presarcopenia.

RESULTS

Presarcopenia was more common in older ( ≥ 70 years, P = 0.008) or female patients (P = 0.045). Patients with presarcopenia had decreased skeletal muscle area (P < 0.001), lower hemoglobin level (P = 0.034), longer time to first flatus (P < 0.001), and more frequent surgical site infection (P = 0.001). However, survival rates were not significantly different between those with and without presarcopenia.

CONCLUSION

Computed tomography-assessed presarcopenia was associated with delayed functional recovery and increased surgical site infection, although it was not revealed as a prognostic factor for oncological outcomes.

Assessing and managing frailty in emergency laparotomy: a WSES position paper

Many countries are facing an aging population. As people live longer, surgeons face the prospect of operating on increasingly older patients. Traditional teaching is that with older age, these patients face an increased risk of mortality and morbidity, even to a level deemed too prohibitive for surgery. However, this is not always true. An active 90-year-old patient can be much fitter than an overweight, sedentary 65-year-old patient with comorbidities. Recent literature shows that frailty-an age-related cumulative decline in multiple physiological systems, is therefore a better predictor of mortality and morbidity than chronological age alone. Despite recognition of frailty as an important tool in identifying vulnerable surgical patients, many surgeons still shun objective tools. The aim of this position paper was to perform a review of the existing literature and to provide recommendations on emergency laparotomy and in frail patients. This position paper was reviewed by an international expert panel composed of 37 experts who were asked to critically revise the manuscript and position statements. The position paper was conducted according to the WSES methodology. We shall present the derived statements upon which a consensus was reached, specifying the quality of the supporting evidence and suggesting future research directions.

Enhanced Recovery After Surgery Is Still Powerful for Colorectal Cancer Patients in COVID-19 Era

Purpose: To figure out whether enhanced recovery after surgery (ERAS) could effectively improve the prognosis of colorectal cancer (CRC) patients and reduce hospitalization expenses under the shadow of COVID-19, furthermore to alleviate the current situation of medical resource for the whole society. Methods: Patients who underwent CRC surgery in the department of gastrointestinal surgery of the First Affiliated Hospital from January 2020 to March 2022 were retrospectively enrolled. According to protocol adherence, all patients were divided into the ERAS group and the non-ERAS group. Short-term outcomes were compared between the two groups. Results: A total of 918 patients were enrolled in the study. Based on protocol adherence ≥70%, 265 patients were classified into the ERAS group and the other 653 patients were classified into the non-ERAS group. Patients in the ERAS group had shorter operation time (P < .01), less intraoperative blood loss (P < .01), shorter overall hospital stay (P < .01) and postoperative hospital stay (P < .01), less hospital costs (P < .01), earlier first flatus (P < .01), earlier first stool (P < .01), earlier food tolerance (P < .01), and lower postoperative complications (P < .01). Univariate and multivariate logistic regression analysis manifested that ERAS and cerebrovascular disease were predictive factors of postoperative overall complications. In univariate analyses, cerebrovascular disease (P = .033, OR = 2.225, 95% CI = 1.066-4.748), time of the surgery (P = .026, OR = 1.417, 95% CI = 1.043-1.925), and ERAS (P < .01, OR = 0.450, 95% CI = 0.307-0.661) were predictive factors. Furthermore, in the multivariate analysis, ERAS (P < .01, OR = 0.440, 95% CI = 0.295-0.656) and cerebrovascular disease (P = .016, OR = 2.575, 95% CI = 1.190-5.575) were independent predictive factors of postoperative overall complications. Conclusion: In summary, under the impact of the COVID-19 pandemic, ERAS could still reduce the financial burden of patients and reduce the incidence of short-term postoperative complications. However, whether the effects of ERAS were enhanced after the pandemic and the long-term outcomes of CRC obey ERAS remained to be further explored.

Pre-Therapeutic Sarcopenia among Cancer Patients: An Up-to-Date Meta-Analysis of Prevalence and Predictive Value during Cancer Treatment

This study will address the prevalence of pre-therapeutic sarcopenia (PS) and its clinical impact during cancer treatment among adult cancer patients ≥ 18 years of age. A meta-analysis (MA) with random-effect models was performed via a MEDLINE systematic review, according to the PRISMA statement, focusing on articles published before February 2022 that reported observational studies and clinical trials on the prevalence of PS and the following outcomes: overall survival (OS), progression-free survival (PFS), post-operative complications (POC), toxicities (TOX), and nosocomial infections (NI). A total of 65,936 patients (mean age: 45.7-85 y) with various cancer sites and extensions and various treatment modes were included. Mainly defined by CT scan-based loss of muscle mass only, the pooled prevalence of PS was 38.0%. The pooled relative risks were 1.97, 1.76, 2.70, 1.47, and 1.76 for OS, PFS, POC, TOX, and NI, respectively (moderate-to-high heterogeneity, I²: 58-85%). Consensus-based algorithm definitions of sarcopenia, integrating low muscle mass and low levels of muscular strength and/or physical performance, lowered the prevalence (22%) and heterogeneity (I² < 50%). They also increased the predictive values with RRs ranging from 2.31 (OS) to 3.52 (POC). PS among cancer patients is prevalent and strongly associated with poor outcomes during cancer treatment, especially when considering a consensus-based algorithm approach.

Prevalence of Sarcopenia and Impact on Survival in Patients with Metastatic Gastroenteropancreatic Neuroendocrine Tumours

Sarcopenia in patients with cancer is associated with adverse outcomes such as shorter survival. However, there exists little evidence regarding the prevalence of sarcopenia in patients with metastatic gastroenteropancreatic neuroendocrine tumours (GEP-NETs). Patients with a histologically confirmed newly diagnosed metastatic GEP-NET between 2006 and 2018, CT scan, and anthropometric data at diagnosis were included in this study. CT scans were analysed for the presence of sarcopenia and correlated with overall survival (OS). In total, 183 patients, 87 male (48%), with a median age of 62 years (IQR 52-68 years), were included. In 44 patients (24%), there was a pancreas NET, and in 136 patients, there was a small bowel NET (74%). Sarcopenia was present in 128 patients (69%) and unrelated to BMI (median 25.1). There were significant survival differences between patients with pancreatic and small bowel NETs at 86 vs. 141 months, respectively (p = 0.04). For patients with pancreatic NETs, the presence of sarcopenia was independently associated with shorter OS (HR 3.79 95% CI 1.1-13.03, p-value 0.035). A high prevalence of sarcopenia at the time of diagnosis of a metastatic GEP-NET was seen and associated with worse OS in patients with pancreatic NETs. Further research should focus on how to reverse sarcopenia and its impact on OS and/or quality of life.

Effect of Sarcopenia on Survival and Health-Related Quality of Life in Patients with Hepatocellular Carcinoma after Hepatectomy

BACKGROUND

Although sarcopenia has been reported as a negative prognostic factor in patients with hepatocellular carcinoma (HCC), the lack of studies with a prospective design utilizing comprehensive sarcopenia assessment with composite endpoints is an important gap in understanding the impact of sarcopenia in patients with HCC. The aim of this study was to investigate the relationship between sarcopenia and postoperative 1-year mortality and health-related quality of life (HRQOL) based on sarcopenia assessment.

METHODS

The study cohort, who received resection surgery for HCC between May 2020 and August 2021, was assessed for sarcopenia based on grip strength, the chair stand test, skeletal muscle mass, and gait speed. The primary outcome measures were 1-year mortality and HRQOL determined using the QLQ-C30 questionnaire. In addition, we collected hospital costs, postoperative hospital stays, complications, 30-day and 90-day mortality, and 90- and 180-day readmission rates. Univariate and multivariate linear regression analyses were conducted to examine factors associated with global health status.

RESULTS

A total of 153 eligible patients were included in the cohort. One-year mortality was higher in patients with sarcopenia than in those without sarcopenia (p = 0.043). There was a correlation between sarcopenia and the surgical approach to global health status (p = 0.025) and diarrhea (p = 0.003).

CONCLUSIONS

Preoperative sarcopenia reduces postoperative survival and health-related quality of life in patients with HCC.

Clinical impact of preoperative and postoperative sarcopenia on oncological outcomes in non-metastatic colorectal cancer

AIM

This study investigated the association between preoperative and postoperative changes in skeletal muscle mass and long-term oncological outcomes in patients with non-metastatic colorectal cancer.

METHOD

Patients who underwent surgery for Stages I-III colorectal cancer from January 2014 to December 2015 were included. Skeletal muscle mass was evaluated through preoperative and postoperative abdominopelvic CT scans. A multivariable analysis was conducted to determine the factors affecting disease-free survival rates.

RESULTS

A total of 238 patients were analysed. Forty-nine (25.9%) patients had preoperative sarcopenia. Patients with preoperative sarcopenia showed lower 3-year disease-free survival (58.5% vs. 78.4%, P = 0.001). Patients with postoperative sarcopenia also showed significantly lower 3-year disease-free survival compared to postoperative patients without sarcopenia at 6, 12 and 18 months, respectively (53.9% vs. 77.8%; 69.7% vs. 81.8%; 69.1% vs. 87.7%, P = 0.004). In a subgroup analysis, patients with both preoperative and postoperative sarcopenia showed the lowest 3-year disease-free survival rates (50.9%). The incidence of tumour recurrence was higher among the patients who had lost more skeletal muscle mass at 12, 18 and 24 months (-14.3 cm² /m² vs. -1.5 cm² /m² , P < 0.001; -24.5 cm² /m² vs. -1.1 cm² /m² , P < 0.001; and -31.6 cm² /m² vs. -1.4 cm² /m² , P < 0.001, respectively). A multivariable analysis demonstrated that the factors associated with disease-free survival included tumour stage, venous invasion, adjuvant chemotherapy, and preoperative or postoperative sarcopenia.

CONCLUSION

Not only preoperative but also postoperative sarcopenic changes adversely affect oncological outcomes following curative resection of colorectal cancer. Careful attention should be given to correcting sarcopenic status from the preoperative to the postoperative period.

Impact of sarcopenia on surgical and oncologic outcomes of laparoscopic surgery for colorectal cancer

BACKGROUND

The study aimed to evaluate the impact of sarcopenia on short- and long-term outcomes for laparoscopic colorectal cancer surgery.

METHODS

Study participants were 209 patients who underwent laparoscopic surgery for any stage of colorectal cancer between 2016 and 2017. Skeletal muscle indices were calculated with preoperative computed tomography. Patients were divided into sarcopenic and non-sarcopenic groups based on index cut-off values and variables were compared.

RESULTS

The prevalence of sarcopenia was 41.1%. Sarcopenic patients experienced shorter operative times and a lower incidence of surgical site infections; however, the incidence of severe postoperative complications and readmission were increased for this group. Although the 3-year disease-free survival rate was not statistically different between groups, sarcopenic patients had a significantly worse 3-year overall survival rate compared with than the non-sarcopenic group.

CONCLUSION

Sarcopenia has both favorable and unfavorable effects on patients who underwent laparoscopic colorectal cancer surgery.

Muscle loss 6 months after surgery predicts poor survival of patients with non-metastatic colorectal cancer

Background

Muscle loss is a common characteristic of cancer-related malnutrition and a predictor of poorer prognosis in oncological patients. This study evaluated the association between altered body composition 6 months after surgery and the prognosis in patients with non-metastatic colorectal cancer.

Materials and methods

A total of 314 patients who underwent elective curative surgery were enrolled in the study. The third lumbar CT images on preoperative and 6-months postoperative were collected to calculate the skeletal muscle index (SMI), visceral adiposity index (VATI), and subcutaneous adiposity index (SATI). Sarcopenia was defined by the cut-off values reported in the literature, and risk factors affecting overall survival (OS) and disease-free survival (DFS) in CRC were analyzed using Cox regression models.

Results

Eighty-two of 314 patients (26.1%) with CRC were diagnosed with sarcopenia before surgery, the preoperative sarcopenia was not significantly associated with the prognosis of CRC patients. There were significant differences in frequency of complications between patient groups according to sarcopenia (41.5 vs. 21.4%, p = 0.004). The Postoperative LOS (11.21 ± 3.04 vs. 8.92 ± 2.84, p &lt; 0.001) was longer in the sarcopenia group than in the non-sarcopenia group, and 30-d readmission (24.4 vs. 6.0%, p &lt; 0.001) was higher in the sarcopenia group compared to the non-sarcopenia group. In multivariate analysis, 6-months SMI loss &gt; 10% after surgery was independently associated with poorer OS [hazard ratio (HR) = 3.74; 95% confidence interval (CI) 1.96 to 7.12; P &lt; 0.001] and DFS (HR = 3.33; 95% CI, 1.71 to 6.47; P &lt; 0.001). SMI changes were moderately correlated with changes in body mass index (BMI) (R = 0.47, P &lt; 0.001).

Conclusion

6-months muscle loss after surgery may affect overall and disease-free survival and was an independent predictor of prognosis in patients with CRC.

CT-Derived Body Composition Assessment as a Prognostic Tool in Oncologic Patients: From Opportunistic Research to Artificial Intelligence-Based Clinical Implementation

CT-based body composition measures are well established in research settings as prognostic markers in oncologic patients. Numerous retrospective studies have shown the role of objective measurements extracted from abdominal CT images of skeletal muscle, abdominal fat, and bone mineral density in providing more accurate assessments of frailty and cancer cachexia in comparison with traditional clinical methods. Quantitative CT-based measurements of liver fat and aortic atherosclerotic calcification have received relatively less attention in cancer care but also provide prognostic information. Patients with cancer routinely undergo serial CT examinations for staging, treatment response, and surveillance, providing the opportunity for quantitative body composition assessment to be performed as part of routine clinical care. The emergence of fully automated artificial intelligence-based segmentation and quantification tools to replace earlier time-consuming manual and semiautomated methods for body composition analysis will allow these opportunistic measures to transition from the research realm to clinical practice. With continued investigation, the measurements may ultimately be applied to achieve more precise risk stratification as a component of personalized oncologic care.

Radiological Features for Frailty Assessment in Patients Requiring Emergency Laparotomy

Introduction: As the number of elderly patients requiring surgical intervention rises, it is believed that frailty syndrome has a greater impact on perioperative course than on chronological age. The aim of this study was to evaluate the efficacy of various imaging features for frailty assessment in patients undergoing emergency laparotomy. Methods: The study included all patients that qualified for emergency surgery with preoperative CT scans between 2016 and 2020 in the Second Department of General Surgery. Multiple trauma patients were excluded from the analysis. The modified frailty index and brief geriatric assessment were used in the analysis. CT images were reviewed for the assessment of osteopenia, sarcopenia, sarcopenic obesity, renal volume and abdominal aorta calcification rate. Results: A total of 261 patients were included in the analysis. Multivariate logistic regression identified every next ASA class (OR: 4.161, 95%CI: 1.672–10.355, p = 0.002), intraoperative adverse events (OR: 12.397, 95%CI: 2.166–70.969, p = 0.005) and osteopenia (OR: 4.213, 95%CI: 1.235–14.367, p = 0.022) as a risk factor for 30-day mortality. Our study showed that every next ASA class (OR: 1.952, 95%Cl: 1.171–3.256, p = 0.010) and every point of the BGA score (OR: 1.496, 95%Cl: 1.110–2.016, p = 0.008) are risk factors for major complications. Conclusions: Osteopenia was the best parameter for perioperative mortality risk stratification in patients undergoing emergency surgical intervention. Sarcopenia (measured as psoas muscle area), sarcopenic obesity, aortic calcifications and mean kidney volume do not predict poor outcomes in those patients. None of the radiological markers appeared to be useful for the prediction of perioperative morbidity.

Associations of intermuscular adipose tissue and total muscle wasting score in PG-SGA with low muscle radiodensity and mass in nonmetastatic colorectal cancer: A two-center cohort study

Backgrounds

The patient-generated subjective global assessment (PG-SGA) is one of the screening criteria for malnutrition, the skeletal muscle radiodensity (SMD) and skeletal muscle mass index (SMI) are associated with survival in colorectal cancer patients. Body composition parameters can be easily assessed; however, few studies have examined the association between total muscle wasting scores in PG-SGA and body composition parameters and two muscle abnormalities.

Methods

This cohort study included 1,637 stage I-III CRC patients from 2 clinical centers in China, who were enrolled in the training cohort (n = 1,005) and validation cohort (n = 632). Baseline data were collected prospectively from patients including age, BMI, staging, gait speed, hand grip strength (HGS), peak expiratory flow (PEF), neutrophil-lymphocyte ratio (NLR), intermuscular adipose tissue (IMAT), visceral fat area (VFA) and total muscle wasting score in PG-SGA. Relevant risk factors were subjected to logistic regression analysis and Cox regression analysis to identify characteristics associated with muscle abnormalities and survival. Based on the logistic model results, normograms were established to predict muscle abnormalities, and its discrimination and calibration were assessed using the receiver operating characteristic (ROC) curve and calibration curve. The Kaplan-Meier curves were used to assess the survival of colorectal cancer patients with malnutrition or sarcopenia in an inflammatory state (assessed by NLR).

Results

The mean age of all participants was 57.7 ± 10.6 years (56.9% males) and the prevalence of low SMD and low SMI was 32.2 and 39.5%, respectively. Low SMD rate was significantly associated with age, TNM stage, BMI, IMAT, walking speed, total muscle wasting score and NRS2002 score by logistic regression analysis (p < 0.05). Low SMI rate was significantly correlated with age, NLR, BMI, PEF, handgrip strength, calf circumference, walking speed, total muscle wasting score and NRS2002 score (p < 0.05). The AUCs of the diagnostic nomograms were 0.859 (95% CI, 0.831-0.886) for low SMD and 0.843 (95% CI, 0.813-0.871) for low SMI in the validation cohort. We also found that patients with colorectal cancer with malnutrition or sarcopenia had a worse prognosis when NLR ≥3.5.

Conclusion

Muscle abnormalities and malnutrition are strongly associated with mortality in patients with non-metastatic colorectal cancer. Early identification and intervention of the associated risk factors may offer new ways to improve patient prognosis.

Preoperative paraspinal and psoas major muscle atrophy and paraspinal muscle fatty degeneration as factors influencing the results of surgical treatment of lumbar disc disease

INTRODUCTION

There is a growing number of publications highlighting sarcopenia and myosteatosis as poor prognosic factors for treatment results in oncological patients. The decrease in the cross-sectional area (CSA) of the multifidus muscle and muscle steatosis is associated with lumbar disc herniation and low back/limb pain. Nevertheless, no studies have analyzed the influence of the above parameters on patient satisfaction, pain decrease and return to daily activities. The aim of the study was to verify whether decreased preoperative CSA of the paraspinal and psoas major muscles and their fatty degeneration (myosteatosis) may influence the outcome of surgical treatment of lumbar disc disease (LDD).

MATERIALS AND METHODS

One hundred and one patients with LDD undergoing open microdiscectomy were enrolled in the analysis. Relative cross-sectional areas (rCSA) of the paraspinal and psoas major muscles as well as their fatty degeneration were measured. Patients were assessed according to the validated Polish versions of the EURO EQ-5D, Core Outcome Measure Index (COMI), Oswestry Disability Index (ODI) and Visual Analog Scale (VAS) 1 and 6 months postoperatively. The association between the variables was calculated using Pearson r and Spearman rank correlation. The Kruskal-Wallis test was used to compare the results between the groups with different rCSA of paraspinal and psoas major muscles and a different degree of paraspinal muscle myosteatosis.

RESULTS

Fatty degeneration of the paraspinal muscles correlated with better outcomes 1 and 6 months postoperatively according to ODI (P = 0.003 and P = 0.027, respectively). Patients with higher rCSA of the paraspinal and psoas major muscles achieved better results on the EURO EQ-5D scale (P = 0.0289 and P = 0.0089, respectively). Higher rCSA of the paraspinal and psoas major muscles did not correlate with better outcomes measured using ODI, COMI and VAS scales (P ≥ 0.072).

CONCLUSION

The degree of fatty degeneration of the paraspinal muscles correlates with better outcomes 1 and 6 months after microdiscectomy.

Sarcopenia predicts worse postoperative outcomes and decreased survival rates in patients with colorectal cancer: a systematic review and meta-analysis

PURPOSE

Previous studies have shown an association of sarcopenia with adverse short- and long-term outcomes in multiple gastrointestinal cancer types. We aimed to investigate the prognostic value of sarcopenia on the postoperative outcomes and survival rates of patients with colorectal cancer (CRC).

METHODS

A systematic literature search was performed using the PubMed, Embase, Cochrane, Google Scholar, and Scopus databases. We included studies that compared postoperative outcomes or survival rates in sarcopenic and non-sarcopenic patients with CRC.

RESULTS

A total of 44 observational studies, comprising 18,891 patients, were included. The pooled prevalence of sarcopenia was 37% (n = 7009). The pooled analysis revealed an association between sarcopenia and higher risk of total postoperative complications (23 studies, OR = 1.84; 95% CI 1.35-2.49), postoperative severe complications (OR = 1.72; 95% CI 1.10-2.68), postoperative mortality (OR = 3.21; 95% CI 2.01-5.11), postoperative infections (OR = 1.40; 95% CI 1.12-1.76), postoperative cardiopulmonary complications (OR = 2.92; 95% CI 1.96-4.37), and prolonged length of stay (MD = 0.77; 95% CI 0.44-1.11) after colorectal cancer surgery. However, anastomotic leakage showed comparable occurrence between sarcopenic and non-sarcopenic patients (OR = 0.99; 95% CI 0.72 to 1.36). Regarding survival outcomes, sarcopenic patients had significantly shorter overall survival (25 studies, HR = 1.83; 95% CI = 1.57-2.14), disease-free survival (HR = 1.55; 95% CI = 1.29-1.88), and cancer-specific survival (HR = 1.77; 95% CI 1.40-2.23) as compared with non-sarcopenic patients.

CONCLUSION

Among patients with colorectal cancer, sarcopenia is a strong predictor of increased postoperative complications and worse survival outcomes.

Sarcopenia as a predictor of postoperative risk of complications, mortality and length of stay following gastrointestinal oncological surgery

INTRODUCTION

Sarcopenia has drawn considerable attention as a predictor of postoperative risk, although the relationship between sarcopenia and postoperative risk is contentious. This meta-analysis was conducted to evaluate this relationship.

METHODS

A systematic literature search up to May 2020 was carried out and 43 studies were identified (with 16,716 patients) reporting on the relationship between sarcopenia and postoperative risk. In order to evaluate this relationship, odds ratios (ORs) with 95% confidence intervals (CIs) were calculated using the dichotomous and continuous method with a random or fixed effects model.

RESULTS

Compared with non-sarcopenic patients, those with sarcopenia have a higher major complications rate (OR: 4.03, 95% CI: 2.49-5.57, p<0.001), a higher total complications rate (OR: 1.77, 95% CI: 1.40-2.24, p<0.001), a higher 30-day mortality rate (OR: 2.38, 95% CI: 1.56-3.63, p<0.001) and a longer hospital stay (mean difference: 4.54 days, 95% CI: 2.49-6.59 days, p<0.001).

CONCLUSIONS

Sarcopenia significantly increases the risk of major complications, total complications, 30-day mortality and length of hospital stay. For this reason, it is recommended that sarcopenia is added to preoperative risk evaluation to avoid any possible negative outcomes following gastrointestinal oncological surgery.

Psoas density - an optimal sarcopaenic indicator associated with postoperative complications after colorectal resection for cancer?

Introduction

Sarcopaenia seems to be predictive factor for postoperative morbidity and mortality after colorectal resection for cancer. Nevertheless, an ideal sarcopaenic indicator is still to be identified.

Aim

To evaluate computed tomography (CT) measured total abdominal muscle area (TAMA), total psoas muscle area (TPA), and psoas density (PD) - previously described sarcopaenia indicators - as possible risk factors for postoperative complications in patients after curative colon and rectal resections for colorectal cancer.

Material and methods

Consecutive patients after elective curative colon or rectal resection for cancer at a single institution were divided into cohorts with uncomplicated postoperative course or complications Clavien-Dindo grade I-II (Cl-Di 0-II) and complications Clavien-Dindo grade III-V (Cl-Di III-V). Cohorts were statistically tested for significant differences in TAMA, TPA, and PD calculated from preoperative staging CT scans at the level of the third lumbar vertebra.

Results

Data of 112 patients were analysed from a prospectively run database; 65 underwent colon and 47 rectal resections. PD was significantly higher in the Cl-Di 0-II cohort compared to the Cl-Di III-V for both colon (42.67 ±6.52 vs. 40.11 ±7.57 HU, p = 0.002) and rectal resections (44.08 ±5.86 vs. 43.03 ±5.70HU, p = 0.016). TAMA and TPA failed to show significant differences.

Conclusions

Psoas density is significantly decreased in patients with Clavien-Dindo grade III-V complications after curative resection for colon and rectal cancer. Due to the simplicity and affordability of its assessment from preoperative staging CT scan, it might be considered an optimal sarcopaenic indicator to be utilised in everyday practice.

Care of the Geriatric Colorectal Surgical Patient and Framework for Creating a Geriatric Program: A Compendium From the 2019 American Society of Colon and Rectal Surgeons Annual Meeting

Supplemental Digital Content is available in the text.

Laparoscopic colorectal cancer surgery reduces the adverse impacts of sarcopenia on postoperative outcomes: a propensity score-matched analysis

BACKGROUND

Sarcopenia is a negative predictor for postoperative recovery. This study was performed to evaluate the short-term outcomes of laparoscopic surgery in colorectal cancer patients with sarcopenia.

METHODS

We conducted a study of patients who underwent curative surgeries for colorectal cancer in two centers from July 2014 to July 2018. In order to reduce selection bias, we conducted a propensity score matching analysis. Preoperative characteristics including age, gender, anemia, body mass index, hypoalbuminemia, America society of anesthesiology scores, epidural anesthesia, operative procedure, stoma, tumor location, and combined resection were incorporated in the model, and produced 58 matched pairs. The third lumbar skeletal muscle mass, handgrip strength, and 6 m usual gait speed were measured to define sarcopenia. Short-term outcomes were compared between the two groups.

RESULTS

In a total of 1136 patients, 272 had sarcopenia diagnosed, and 227 were further analyzed in this study. Among them, 108 patients underwent laparoscopic colorectal surgery and 119 underwent open colorectal surgery. In the matched cohort, the clinical characteristics of the two groups were well matched. The laparoscopic group had significantly reduced overall complications (15.5% vs. 36.2%, P = 0.016) and shorter postoperative hospital stays (10.5 vs. 14, P = 0.027). Subgroup analysis of postoperative complications showed that the incidence of surgical complications (P = 0.032) was lower in the laparoscopic group. Hospitalization costs (P = 0.071) and 30-day readmissions (P = 0.215) were similar between the two groups.

CONCLUSION

Laparoscopic surgery for colorectal cancer is a safe and feasible option with better short-term outcomes in patients with sarcopenia.

Clinical impact of sarcopenia in patients with colon cancer undergoing laparoscopic surgery

Purpose

Previous studies have reported that progressive muscle loss, known as sarcopenia, has a negative impact on colon cancer treatment. However, the majority of studies have analyzed on patients undergoing open resection, and the association of sarcopenia with clinical outcomes is not clear for patients with colon cancer undergoing laparoscopic surgery. Thus, the aim of this study was to evaluate the impact of sarcopenia on clinical outcomes after laparoscopic surgery for colon cancer.

Methods

A total of 423 patients who underwent laparoscopic surgery for colon cancer between November 2010 and October 2014 were included. Body composition was assessed by measuring muscle and fat areas at the third lumbar vertebra (L3) on preoperative computed tomography. The L3 skeletal muscle area was used to calculate the skeletal muscle index and to assess for sarcopenia.

Results

Sarcopenia was identified in 54 patients (12.8%). The median time to first flatus (3 days), median time to tolerable soft diet (4 days), and median length of hospital stay (7 days) were not significantly different between patients with and without sarcopenia. However, sarcopenia was an independent risk factor for postoperative complications in the logistic regression multivariate analysis (P = 0.015). Sarcopenia was not associated with overall or disease-free survival.

Conclusion

Sarcopenia was not negatively associated with functional recovery, hospital stay, and oncologic outcomes in patients with colon cancer who underwent laparoscopic surgery. However, sarcopenia was associated with postoperative complications after laparoscopic surgery for colon cancer.

Skeletal muscle index is an independent predictor of early recurrence in non-obese colon cancer patients

Purpose

Progressive loss (sarcopenia) and fatty infiltration of muscle mass (myosteatosis) are well-established risk factors for an adverse clinical outcome in obese patients. Data concerning non-obese sarcopenic patients in oncologic surgery are scarce and heterogeneous. The aim of this study was to determine the impact of sarcopenia and myosteatosis in non-obese patients with cancer of the right colon on clinical outcome.

Methods

This study comprised 85 patients with a BMI < 30 kg/m², who underwent surgery for right colon cancer in a single center. Skeletal muscle area (SMA), visceral fat area (VFA), and myosteatosis were retrospectively assessed using preoperative abdominal CT images. Univariate und multivariate analysis was performed to evaluate the association between body composition, complications, and oncologic follow-up.

Results

Traditional risk factors such as visceral fat (p = 0.8653), BMI (p = 0.8033), myosteatosis (p = 0.7705), and sarcopenia (p = 0.3359) failed to show any impact on postoperative complications or early recurrence. In our cohort, the skeletal muscle index (SMI) was the only significant predictor for early cancer recurrence (p = 0.0467).

Conclusion

SMI is a significant prognostic factor for early cancer recurrence in non-obese colon cancer patients. Our study shows that conventional thresholds for sarcopenia and BMI do not seem to be reliable across various cohorts. Target prehabilitation programs could be useful to improve outcome after colorectal surgery.

Trial Registration

DRKS00014655, www.apps.who.int/trialsearch

Low skeletal muscle mass and postoperative morbidity in surgical oncology: a systematic review and meta-analysis

BACKGROUND

Sarcopenia might function as an indicator for frailty, and as such as a risk factor for the development of postoperative complications. The aim of this study was to meta-analyse the relation between preoperative sarcopenia and the development of severe postoperative complications in patients undergoing oncological surgery.

METHODS

PubMed and Embase databases were systematically searched from inception until May 2018. Included were studies reporting on the incidence of severe postoperative complications and radiologically determined preoperative sarcopenia. Studies reporting the skeletal muscle as a continuous variable only were excluded. Data were extracted independently by two reviewers. Random effect meta-analyses were applied to estimate the pooled odds ratio (OR) with 95% confidence intervals (95% CI) for severe postoperative complications, defined as Clavien-Dindo grade ≥3, including 30-day mortality. Heterogeneity was evaluated with I2 testing. Analyses were performed overall and stratified by measurement method, tumour location and publication date.

RESULTS

A total of 1924 citations were identified, and 53 studies (14 295 patients) were included in the meta-analysis. When measuring the total skeletal muscle area, 43% of the patients were sarcopenic, versus 33% when measuring the psoas area. Severe postoperative complications were present in 20%, and 30-day mortality was 3%. Preoperative sarcopenia was associated with an increased risk of severe postoperative complications (ORpooled : 1.44, 95% CI: 1.24-16.8, P<0.001, I2 =55%) and 30-day mortality (ORpooled : 2.15, 95% CI: 1.46-3.17, P<0.001, I2 =14%). A low psoas mass was a stronger predictor for severe postoperative complications compared with a low total skeletal muscle mass (ORpooled : 2.06, 95% CI: 1.37-3.09, ORpooled : 1.32, 95% CI: 1.14-1.53, respectively) and 30-day mortality [ORpooled : 6.17 (95% CI: 2.71-14.08, ORpooled : 1.80 (95% CI: 1.24-2.62), respectively]. The effect was independent of tumour location and publication date.

CONCLUSIONS

The presence of low psoas mass prior to surgery, as an indicator for sarcopenia, is a common phenomenon and is a strong predictor for the development of postoperative complications. The presence of low total skeletal muscle mass, which is even more frequent, is a less informative predictor for postoperative complications and 30-day mortality. The low heterogeneity indicates that the finding is consistent over studies. Nevertheless, the value of sarcopenia relative to other assessments such as frailty screening is not clear. Research is needed in order to determine the place of sarcopenia in future preoperative risk stratification.

Impact of visceral obesity and sarcobesity on surgical outcomes and recovery after laparoscopic resection for colorectal cancer

BACKGROUND & AIMS

Studies analyzing the impact of visceral fat excess on surgical outcomes after resection for colorectal cancer (CRC) have yielded conflicting results. Visceral obesity (VO) and sarcobesity (SO) have been recently addressed as risk factors for poor short-term results while no data are available for recovery goals after surgery. No data are available on the protective effect of ERAS in VO and SO patients. The aim of this study was to assess clinical implications of computed tomography (CT) assessed VO and SO on surgical and recovery outcomes after minimally invasive resection for CRC before and after ERAS protocol implementation.

METHODS

Visceral adipose tissue (VAT) and skeletal muscle area (SMA) were retrospectively assessed using pre-operative CT studies of 261 patients who underwent laparoscopic resection for CRC between January 2012 and April 2019; ERAS protocol was adopted in 160 patients operated on after March 2014. Patients' surgical and recovery outcomes were compared according to BMI categories, VO and SO which was defined using the VAT/SMA ratio (Sarcobesity Index). Predictive factors for poor surgical and recovery outcomes were evaluated by univariate and multivariate analyses.

RESULTS

Of the 261 patients, 12.6% were BMI obese while 68.6% presented visceral obesity. BMI was not associated to any of the outcomes considered. No differences in intra-operative results were found except for a lower number of retrieved lymph nodes both in VO and SO patients. While VO showed no impact on post-operative course, SO resulted an independent risk factor for cardiac complications and prolonged post-operative ileus (PPOI) at logistic regression analysis. Furthermore, sarcobese patients showed delayed recovery after surgery. Patients enrolled in the ERAS protocol showed improved recovery outcomes for both VO and SO groups, although ERAS did not result to be a protective factor for cardiac complications and PPOI.

CONCLUSIONS

A high Sarcobesity Index is a risk factor for developing cardiac complications and PPOI after laparoscopic resection for CRC. A reduced number of lymph nodes retrieved is associated to VO and SO. These conditions should then be considered in clinical practice for the risk of down staging the N stage. Effect of VO and SO on recovery items after surgery should be further investigated. ERAS protocol application should be implemented to improve recovery outcomes in VO and SO patients undergoing laparoscopic colorectal resection.

Assessing skeletal muscle radiodensity by computed tomography: An integrative review of the applied methodologies

Low-radiodensity skeletal muscle has been related to the degree of muscle fat infiltration and seems to be associated with worse outcomes. The aim of this study was to summarize the methodologies used to appraise skeletal muscle radiodensity by computed tomography, to describe the terms used in the literature to define muscle radiodensity and to give recommendations for its measurement standardization. An integrative bibliographic review in four databases included studies published until August 2019 in Portuguese, English or Spanish and performed in humans, adults and/or the elderly, of both sex, which investigated skeletal muscle radiodensity through computed tomography (CT) of the region between the third and fifth lumbar vertebrae and evaluated at least two muscular groups. One hundred and seventeen studies were selected. We observed a trend towards selecting all abdominal region muscle. A significant methodological variation in terms of contrast use, selection of skeletal muscle areas, radiodensity ranges delimitation and their cut-off points, as well as the terminologies used, was also found. The methodological differences detected are probably due to the lack of more precise information about the correlation between skeletal muscle radiodensity by CT and its molecular composition, among others. Therefore, until the gaps are addressed in future studies, authors should avoid arbitrary approaches when reporting skeletal muscle radiodensity, especially when it comes to prognosis inference. Studies using both CT and direct methods of muscle composition evaluation are encouraged, to enable the definition and validation of the best approach to classify fat-infiltrated muscle tissue, which will favour the nomenclature uniformization.

Sarcopenia in patients with colorectal cancer: A comprehensive review

Colorectal cancer (CRC) is the third most commonly diagnosed cancer globally and the second cancer in terms of mortality. The prevalence of sarcopenia in patients with CRC ranges between 12%-60%. Sarcopenia comes from the Greek "sarx" for flesh, and "penia" for loss. Sarcopenia is considered a phenomenon of the aging process and precedes the onset of frailty (primary sarcopenia), but sarcopenia may also result from pathogenic mechanisms and that disorder is termed secondary sarcopenia. Sarcopenia diagnosis is confirmed by the presence of low muscle quantity or quality. Three parameters need to be measured: muscle strength, muscle quantity and physical performance. The standard method to evaluate muscle mass is by analyzing the tomographic total cross-sectional area of all muscle groups at the level of lumbar 3rd vertebra. Sarcopenia may negatively impact on the postoperative outcomes of patients with colorectal cancer undergoing surgical resection. It has been described an association between sarcopenia and numerous poor short-term CRC outcomes like increased perioperative mortality, postoperative sepsis, prolonged length of stay, increased cost of care and physical disability. Sarcopenia may also negatively impact on overall survival, disease-free survival, recurrence-free survival, and cancer-specific survival in patients with non-metastatic and metastatic colorectal cancer. Furthermore, patients with sarcopenia seem prone to toxic effects during chemotherapy, requiring dose deescalations or treatment delays, which seems to reduce treatment efficacy. A multimodal approach including nutritional support (dietary intake, high energy, high protein, and omega-3 fatty acids), exercise programs and anabolic-orexigenic agents (ghrelin, anamorelin), could contribute to muscle mass preservation. Addition of sarcopenia screening to the established clinical-pathological scores for patients undergoing oncological treatment (chemotherapy, radiotherapy or surgery) seems to be the next step for the best of care of CRC patients.

CT-assessed sarcopenia is a predictive factor for both long-term and short-term outcomes in gastrointestinal oncology patients: a systematic review and meta-analysis

BACKGROUND

The impact of sarcopenia on the outcome of gastrointestinal (GI) oncological patients is still controversial. We aim to discuss the prevalence of sarcopenia and its relation to the oncological outcome.

METHODS

Embase, Medline, PubMed, and the Cochrane library were systematically searched for related keywords. Studies using CT to assess sarcopenia and evaluate its relationship with the outcome of GI oncological patients were included. Long-term outcomes, including overall survival and disease-free survival, were compared by hazard ratios (HRs) with 95% confidence intervals (CIs). Short-term outcomes, including total complications and major complications (Clavien-Dindo ≥IIIa) after curable surgery, were compared by the risk ratio (RR) and 95% CI.

RESULTS

A total of 70 studies including 21,875 patients were included in our study. The median incidence of sarcopenia was 34.7% (range from 2.1 to 83.3%). A total of 88.4% of studies used skeletal muscle index (SMI) in the third lumbar level on CT to define sarcopenia, and a total of 19 cut-offs were used to define sarcopenia. An increasing trend was found in the prevalence of sarcopenia when the cut-off of SMI increased (β = 0.22, 95% CI = 0.12-0.33, p < 0.001). The preoperative incidence of sarcopenia was associated both with an increased risk of overall mortality (HR = 1.602, 95% CI = 1.369-1.873, P < 0.001) and with disease-free mortality (HR = 1.461, 95% CI = 1.297-1.646, P < 0.001). Moreover, preoperative sarcopenia was a risk factor for both total complications (RR = 1.188, 95% CI = 1.083-1.303, P < 0.001) and major complications (RR = 1.228, 95% CI = 1.042-1.448, P = 0.014).

CONCLUSION

The prevalence of sarcopenia depends mostly on the diagnostic cut-off points of different criteria. Preoperative sarcopenia is a risk factor for both long-term and short-term outcomes.

Sarcopenia and Postoperative Complication Risk in Gastrointestinal Surgical Oncology: A Meta-analysis

OBJECTIVE

The aim of the study was to evaluate sarcopenia as a predictor of postoperative risk of major and total complications after surgery for gastrointestinal cancer.

BACKGROUND

Sarcopenia is associated with poor survival in gastrointestinal cancer patients, but the role of sarcopenia as prognostic tool in surgical oncology has not been established, and no consensus exists regarding assessment and management of sarcopenic patients.

METHODS

We performed a systematic search for citations in EMBASE, Web of Science, and PubMed from 2004 to January 31, 2017. Random effects meta-analyses were used to estimate the pooled risk ratio for postoperative complications by Clavien-Dindo grade (total complications: grade ≥2; major complications: grade ≥3) in patients with sarcopenia versus patients without sarcopenia. Stratified analyses were performed by sarcopenia criteria, cutoff level, assessment methods, study quality, cancer diagnosis, and "Enhanced Recovery After Surgery" care.

RESULTS

Twenty-nine studies (n = 7176) were included with sarcopenia prevalence ranging between 12% and 78%. Preoperative incidence of sarcopenia was associated with increased risk of major complications (risk ratio 1.40; 95% confidence interval, 1.20-1.64; P < 0.001; I = 52%) and total complications (risk ratio 1.35; 95% confidence interval, 1.12-1.61; P = 0.001; I = 60%). Moderate heterogeneity was found for both meta-analyses. Subgroup analyses showed that sarcopenia remained a consistent risk factor across stratification by sarcopenia criteria, assessment methods, study quality, and diagnoses.

CONCLUSIONS

Sarcopenia was associated with an increased risk of complications after gastrointestinal tumor resection, but lack of methodological consensus hampers the interpretation and clinical utilization of these findings. Combining assessment of muscle mass with measures of physical function may increase the prognostic value and accuracy in preoperative risk stratification.

Evaluation of the learning curve of transanal total mesorectal excision: single-centre experience

Introduction

Transanal total mesorectal excision (TaTME) has been recently proposed to overcome the difficulties of the standard TME approach, allowing better visualization and dissection of the mesorectal fascia. Although TaTME seems very promising, the evidence and body of knowledge on achieving proficiency in performing it are still sparse.

Aim

To evaluate the learning curve of TaTME based on a single centre’s experience.

Material and methods

Consecutive patients undergoing TaTME since 2014 in a tertiary referral department were included in the study. All procedures were performed by one experienced surgeon. CUSUM curve analyses were performed to evaluate learning curves.

Results

Sixty-six patients underwent TaTME. After analysis of postoperative morbidity rate, intraoperative adverse effects and operative time, we estimated that 40 cases are needed to achieve TaTME proficiency. Subsequently, patients were divided into two groups: before (40 patients) and after overcoming the learning curve (26 patients). Group 1 had higher readmission (p = 0.041) and complication rates (p = 0.019). There were no statistically significant differences in terms of intraoperative adverse effects, length of stay or pathological quality of the specimen.

Conclusions

Transanal total mesorectal excision is a promising yet technically demanding procedure and requires at least 40 cases to complete the learning curve. More data are needed to introduce it as a standard procedure for low rectal cancer treatment.

Risk Factors for Prolonged Length of Hospital Stay and Readmissions After Laparoscopic Sleeve Gastrectomy and Laparoscopic Roux-en-Y Gastric Bypass

Background

Laparoscopic sleeve gastrectomy (LSG) and laparoscopic gastric bypass (LRYGB) are most commonly performed bariatric procedures. Laparoscopic approach and enhanced recovery after surgery (ERAS) protocols managed to decrease length of hospital and morbidity. However, there are patients in whom, despite adherence to the protocol, the length of stay (LOS) remains longer than targeted. This study aimed to assess potential risk factors for prolonged LOS and readmissions.

Methods

The study was a prospective observation with a post-hoc analysis of bariatric patients in a tertiary referral university teaching hospital. Inclusion criteria were undergoing laparoscopic bariatric surgery. Exclusion criteria were occurrence of perioperative complications, prior bariatric procedures, and lack of necessary data. The primary endpoints were the evaluations of risk factors for prolonged LOS and readmissions.

Results

Median LOS was 3 (2–4) days. LOS > 3 days occurred in 145 (29.47%) patients, 79 after LSG (25.82%) and 66 after LRYGB (35.48%; p = 0.008). Factors significantly prolonging LOS were low oral fluid intake, high intravenous volume of fluids administered on POD0, and every additional 50 km distance from habitual residence to bariatric center. The risk of hospital readmission rises with occurrence of intraoperative adverse events and low oral fluid intake on the day of surgery on.

Conclusions

Risk factors for prolonged LOS are low oral fluid intake, high intravenous volume of fluids administered on POD0, and every additional 50 km distance from habitual residence. Risk factors for hospital readmission are intraoperative adverse events and low oral fluid intake on the day of surgery.

Is It Possible to Maintain High Compliance with the Enhanced Recovery after Surgery (ERAS) Protocol?-A Cohort Study of 400 Consecutive Colorectal Cancer Patients

The aim of our study was to evaluate the implementation and degree of adherence to the Enhanced Recovery after Surgery (ERAS) protocol in a group of 400 patients operated laparoscopically for colorectal cancer, and to assess its impact on the short-term results. The prospective study included patients with histologically confirmed colorectal cancer undergoing elective laparoscopic resection from years 2012 to 2017. For the purpose of further analysis, patients were divided into four groups: 100 consecutive patients were in each group. There were no statistically significant differences between groups in demographic parameters. The mean compliance with the ERAS protocol in the entire study group was 84.8%. Median adherence differed between the groups 76.9% vs. 92.3% vs. 84.6% vs. 84.6%, respectively (p < 0.0001). There were statistically significant differences between groups in the tolerance of oral diet (54% vs. 83% vs. 83% vs. 64%) and mobilization (74% vs. 92% vs. 91% vs. 94%) on the first postoperative day. In subsequent groups, time to first flatus decreased (2.5 vs. 2.1 vs. 2.0 vs. 1.7 days, p = 0.0001). There were no statistical differences in the postoperative morbidity rate between groups (p = 0.4649). The median length of hospital stay in groups was 5 vs. 4 vs. 4 vs. 4 days, respectively (p = 0.0025). Maintaining high compliance with the ERAS protocol is possible, despite the slight decrease that occurs within a few years after its implementation. This decrease in compliance does not affect short-term results, which are comparable to those shortly after overcoming the learning curve.

Can sarcopenia be a predictor of prognosis for patients with non-metastatic colorectal cancer? A systematic review and meta-analysis

PURPOSE

We aimed to explore whether sarcopenia diagnosed with the third lumbar vertebra skeletal muscle index (L3 SMI) can be a predictor of prognosis for colorectal cancer (CRC) patients.

METHODS

A systematic review and meta-analysis was conducted using PubMed, Embase, and the Web of Science databases. All original comparative studies published in English that were related to sarcopenia versus non-sarcopenia in non-metastatic CRC patients based on postoperative and survival outcomes were included. Data synthesis and statistical analysis were carried out using Stata software.

RESULTS

A total of 12 studies including 5337 patients were included in our meta-analysis. In our overall analyses of postoperative outcomes, we indicated that CRC patients with sarcopenia would have longer hospital stays, higher incidence of total postoperative morbidity (OR = 1.70, 95% CI = 1.07-2.70, P < 0.01), mortality (OR = 3.45, 95% CI = 1.69-7.02, P < 0.01), and infection (OR = 2.21, 95% CI = 1.50-3.25, P < 0.01) but not anastomosis leakage or intestinal obstruction when compared to non-sarcopenia patients. Regarding survival outcomes, our results showed that sarcopenia predicted a decreased overall survival (HR = 1.63, 95% CI = 1.24-2.14, P < 0.01), disease-free survival, and cancer-specific survival for non-metastatic CRC patients. Moreover, our subgroup analyses showed similar tendency with our overall analyzed results.

CONCLUSIONS

Sarcopenia diagnosed with L3 SMI can be a negative predictor of postoperative and survival outcomes for non-metastatic CRC patients. Prospective studies with a uniform definition of sarcopenia are needed to update our findings.

Improvement of recovery parameters using patient-controlled epidural analgesia for video-assisted thoracoscopic surgery lobectomy in enhanced recovery after surgery: A prospective, randomized single center study

Background

We compared the effects of thoracic epidural analgesia (TEA) to conventional patient‐controlled analgesia (PCA) on several postoperative parameters of recovery after elective video‐assisted thoracoscopic (VATS) lobectomy.

Methods

Ninety‐eight patients undergoing elective VATS lobectomy were enrolled. The primary endpoint was pain score. Recovery of bowel function, length of stay in the postanesthesia care unit (PACU), duration of postoperative hospital stay, and complications were assessed. Continuous variables were expressed and compared between groups using either a two‐tailed Student's t or Mann‐Whitney U test. Recovery of bowel function was compared using the log‐rank test.

Results

Baseline characteristics between the groups were similar. Dynamic pain scores on postoperative days (PODs) 0–2 were significantly lower in the TEA group, as were resting pain scores on PODs 1 and 2 (P < 0.05). The mean duration to first flatus (16 ± 0.7 vs. 26 ± 0.7 hours; P < 0.001) and the mean length of stay in the PACU (34 vs. 67 minutes; P = 0.027) were shorter in the TEA compared to the PCA group, respectively. The only difference in postoperative complications was regarding confusion (5 TEA vs. 18 PCA patients; P = 0.002). No difference in overall length of stay was noted.

Conclusions

Compared to PCA, TEA provided better postoperative pain control after VATS lobectomy and facilitated postoperative recovery of bowel function without increasing the length of hospital stay. This beneficial effect of TEA might be attributed to the attenuation of sympathetic hyperactivation, improved analgesia, and reduced opioid use.

Assessment of Computed Tomography (CT)-Defined Muscle and Adipose Tissue Features in Relation to Short-Term Outcomes After Elective Surgery for Colorectal Cancer: A Multicenter Approach

BACKGROUND

Sarcopenia, visceral obesity (VO), and reduced muscle radiodensity (myosteatosis) are suggested risk factors for postoperative morbidity in colorectal cancer (CRC), but usually are not concurrently assessed. Published thresholds used to define these features are not CRC-specific and are defined in relation to mortality, not postoperative outcomes. This study aimed to evaluate body composition in relation to length of hospital stay (LOS) and postoperative outcomes.

METHODS

Pre-surgical computed tomography (CT) images were assessed for total area and radiodensity of skeletal muscle and visceral adipose tissue in a pooled Canadian and UK cohort (n = 2100). Sex- and age-specific values for these features were calculated. For 1139 of 2100 patients, LOS data were available, and sex- and age-specific thresholds for sarcopenia, myosteatosis, and VO were defined on the basis of LOS. Association of CT-defined features with LOS and readmissions was explored using negative binomial and logistic regression models, respectively.

RESULTS

In the multivariable analysis, the predictors of LOS (P < 0.001) were age, surgical approach, major complications (incidence rate ratio [IRR] 2.42; 95% confidence interval [CI] 2.18-2.68), study cohort, and three body composition profiles characterized by myosteatosis combined with either sarcopenia (IRR, 1.27; 95% CI 1.12-1.43) or VO (IRR, 1.25; 95% CI 1.10-1.42), and myosteatosis combined with both sarcopenia and VO (IRR, 1.58; 95% CI 1.29-1.93). In the multivariable analysis, risk of readmission was associated with VO alone (odds ratio [OR] 2.66; 95% CI 1.18-6.00); P = 0.018), VO combined with myosteatosis (OR, 2.72; 95% CI 1.36-5.46; P = 0.005), or VO combined with myosteatosis and sarcopenia (OR, 2.98; 95% CI 1.06-5.46; P = 0.038). Importantly, the effect of body composition profiles on LOS and readmission was independent of major complications.

CONCLUSION

The findings showed that CT-defined multidimensional body habitus is independently associated with LOS and hospital readmission.

Current status of enhanced recovery after surgery (ERAS) protocol in gastrointestinal surgery

Enhanced Recovery After Surgery (ERAS) is an evidence-based paradigm shift in perioperative care, proven to lower both recovery time and postoperative complication rates. The role of ERAS in several surgical disciplines was reviewed. In colorectal surgery, ERAS protocol is currently well established as the best care. In gastric surgery, 2014 saw an establishment of ERAS protocol for gastrectomies with resulting meta-analysis showing ERAS effectiveness. ERAS has also been shown to be beneficial in liver surgery with many centers starting implementation. The advantages of ERAS in pancreatic surgery have been strongly established, but there is still a need for large-scale, multicenter randomized trials. Barriers to implementation were analyzed, with recent studies concluding that successful implementation requires a multidisciplinary team, a willingness to change and a clear understanding of the protocol. Additionally, the difficulty in accomplishing necessary compliance to all protocol items calls for new implementation strategies. ERAS success in different patient populations was analyzed, and it was found that in the elderly population, ERAS shortened the length of hospitalization and did not lead to a higher risk of postoperative complications or readmissions. ERAS utilization in the emergency setting is possible and effective; however, certain changes to the protocol may need to be adapted. Therefore, further research is needed. There remains insufficient evidence on whether ERAS actually improves patients’ course in the long term. However, since most centers started to implement ERAS protocol less than 5 years ago, more data are expected.

Minimally invasive pancreatic cancer surgery: What is the current evidence?

Surgery remains the only option to cure pancreatic cancer. Although the use of laparoscopy in oncology is rapidly growing worldwide, its efficacy in pancreatic surgery remains controversial. A number of studies have compared outcomes of minimally invasive and open pancreatic resections. However, they are mostly non-randomized trials including relatively small groups of patients. In addition, most of these studies were conducted in high-volume pancreatic centres. It seems that despite longer operative time, laparoscopy may be beneficial in terms of morbidity, blood loss and hospital stay. Thus far, very little is known about the long-term outcomes of laparoscopic surgery for pancreatic cancer. Our aim was to review current evidence for the use of minimally invasive techniques in patients with pancreatic malignancy.