Treatment of Elderly Patients with Colorectal Cancer

Outcomes of Robot-Assisted Versus Laparoscopic Surgery for Colorectal Cancer in Adults Aged 75 Years and Older: A Propensity Score-Matched Analysis of the US Nationwide Inpatient Sample

BACKGROUND

Robot-assisted surgery has been increasingly adopted in colorectal cancer resection.

OBJECTIVE

The study aimed to compare the inpatient outcomes of robot-assisted versus conventional laparoscopic colorectal cancer resection in patients aged 75 years and older.

DESIGN

A retrospective, population-based study.

SETTINGS

This study analyzed data from the United States Nationwide Inpatient Sample from 2005 to 2018.

PATIENTS

Patients with colorectal cancer aged 75 years and older and who underwent robot-assisted or conventional laparoscopic resection.

MAIN OUTCOME MEASURES

Postoperative complications, prolonged length of stay, and total hospital costs were assessed.

RESULTS

Data from 14,108 patients were analyzed. After adjustment, any postoperative complications (adjusted OR = 0.87; 95% CI, 0.77-0.99; p = 0.030) and prolonged length of stay (adjusted OR = 0.78; 95% CI, 0.67-0.91; p = 0.001) were significantly less in the robotic than the laparoscopic group. In addition, robotic surgery was associated with significantly higher total hospital costs (26.06 USD greater cost; 95% CI, 21.35-30.77 USD; p < 0.001).

LIMITATIONS

The analysis was limited by its retrospective and observational nature, potential coding errors, and the lack of intraoperative factors, such as operative time, laboratory measures, and information on surgeons' experience.

CONCLUSIONS

In the United States, in patients with colorectal cancer aged 75 years and older who were undergoing tumor resections, compared to conventional laparoscopic surgery, robotic surgery is associated with better inpatient outcomes in terms of complication rate and risk of prolonged length of stay. This finding is especially true among patients with colon cancer. However, robotic surgery is associated with higher total hospital costs. See Video Abstract .

RESULTADOS DE LA CIRUGA ASISTIDA POR ROBOT FRENTE A LA CIRUGA LAPAROSCPICA PARA EL CNCER COLORRECTAL EN ADULTOS AOS DE EDAD UN ANLISIS EMPAREJADO POR PUNTUACIN DE PROPENSIN DE LA MUESTRA NACIONAL DE PACIENTES HOSPITALIZADOS DE ESTADOS UNIDOS

ANTECEDENTES:La cirugía asistida por robot se ha adoptado cada vez más en la resección del cáncer colorrectal.OBJETIVO:El estudio tuvo como objetivo comparar los resultados hospitalarios de la resección del cáncer colorrectal asistida por robot versus la laparoscópica convencional en pacientes ≥ 75 años.DISEÑO:Estudio retrospectivo de base poblacional.AJUSTES:Este estudio analizó datos de la Muestra Nacional de Pacientes Hospitalizados de Estados Unidos de 2005 a 2018.PACIENTES:Pacientes con cáncer colorrectal ≥ 75 años y sometidos a resección laparoscópica convencional o asistida por robot.PRINCIPALES MEDIDAS DE RESULTADO:Se evaluaron las complicaciones posoperatorias, la duración prolongada de la estancia hospitalaria y los costos hospitalarios totales.RESULTADOS:Se analizaron datos de 14.108 pacientes. Después del ajuste, cualquier complicación posoperatoria (aOR = 0,87; IC del 95 %: 0,77-0,99, p = 0,030) y duración prolongada de la estancia hospitalaria (aOR = 0,78; IC del 95 %: 0,67-0,91, p = 0,001) fueron significativamente menores en el grupo robótico que el grupo laparoscópico. Además, la cirugía robótica se asoció con costos hospitalarios totales significativamente mayores ($26,06 USD mayor costo; IC 95%: 21,35-30,77 USD, p < 0,001).LIMITACIONES:El análisis estuvo limitado por su naturaleza retrospectiva y observacional, posibles errores de codificación y la falta de factores intraoperatorios como el tiempo operatorio, medidas de laboratorio e información sobre la experiencia de los cirujanos.CONCLUSIONES:En Estados Unidos, los pacientes con cáncer colorrectal ≥ 75 años que se sometieron a resecciones tumorales, en comparación con la cirugía laparoscópica convencional, la cirugía robótica se asocia con mejores resultados hospitalarios en términos de tasa de complicaciones y riesgo de estadía prolongada, especialmente entre pacientes con cáncer de colon. Sin embargo, la cirugía robótica se asocia a costes hospitalarios totales más elevados. (Traducción-Yesenia Rojas-Khalil ).

Correlation between TEX14 and ADAM17 expressions in colorectal cancer tissues of elderly patients and neoplasm staging, invasion, and metastasis

BACKGROUND

Colorectal cancer (CRC) is one of the most frequently encountered malignant tumors in clinical settings. Proteins encoded by the testis-expressed gene 14 (TEX14) are imperative for spermatogenesis, necessitating intercellular bridges between germ cells. Anomalous expression of TEX14 has also been associated with the proliferation and differentiation of certain tumor cells. Recombinant A disintegrin and metalloprotease 17 (ADAM17) is known as a membrane-bound protease that regulates cellular activities and signal transduction by hydrolyzing various substrate proteins on the cell membrane. We hypothesize that TEX14 and ADAM17 may serve as potential biomarkers influencing the staging, invasion, and metastasis of CRC.

AIM

To probe the correlation between TEX17 and ADAM17 profiles in the CRC tissues of elderly patients and their association with CRC staging, invasion, and metastasis.

METHODS

We gathered data from 86 elderly patients diagnosed pathologically with CRC between April 2020 and December 2023. For each patient, one sample of cancer tissue and one sample of adjacent normal tissue were harvested. Real-time fluorescence quantitative PCR measured the mRNA profiles of TEX14 and ADAM17. Immunohistochemistry ascertained the positivity rates of TEX14 and ADAM17 expressions. Clinical pathological features of neoplasm staging, invasion, and metastasis were collected, and the association between TEX14 and ADAM17 expressions and clinical pathology was evaluated.

RESULTS

The mRNA and expression profiles of TEX14 and ADAM17 were significantly elevated in CRC tissues. The positivity rates of TEX14 and ADAM17 proteins in CRC tissues were 70.93% and 77.91%, respectively. There were no significant differences in age, sex, pathological type, and tumor diameter between TEX14 and ADAM17-positive and -negative patients. Patients with higher tumor differentiation degree, deeper infiltration and TNM stages ranging from III to IV exhibited higher positivity rates of TEX14 and ADAM17. Patients with lymph node metastasis and distant metastasis showed higher positivity rates of TEX14 and ADAM17 than those without. Positive expressions of TEX14 and ADAM17 were highly correlated with tumor staging, invasion, and metastasis.

CONCLUSION

TEX14 and ADAM17 profiles were significantly elevated in the CRC tissues of elderly patients, and their high expressions were associated with tumor staging, invasion, and metastasis.

Laparoscopic vs. open surgery for rectal cancer in patients with obesity: short-term outcomes and relapse-free survival across age groups

PURPOSE

To investigate the efficacy of laparoscopic surgery for rectal cancer in obese and older patients, who are often characterized by a higher prevalence of comorbidities and physical decline.

METHODS

This large-scale multicenter retrospective cohort study included 524 patients with a body mass index of 25 or higher who underwent either open or laparoscopic surgery for stage II or III rectal cancer between 2009 and 2013. We assessed the short-term outcomes and relapse-free survival by comparing these surgical modalities. The patients were stratified into 404 non-elderly (< 70 years) and 120 elderly (≥ 70 years) patients.

RESULTS

In both patient groups, laparoscopic surgery was associated with a significantly reduced blood loss (non-elderly: 41 vs. 545 ml; elderly: 50 vs. 445 ml) and shorter hospital stays (non-elderly: 10 vs. 19 days; elderly: 15 vs. 20 days) than open surgery. The overall complications and relapse-free survival showed no significant differences between the two surgical techniques in either age group. Additionally, the impact of the laparoscopic procedure on the relapse-free survival remained consistent between the age groups.

CONCLUSION

Laparoscopic surgery offers short-term benefits for patients with obesity and rectal cancer compared to open surgery, regardless of age, without influencing the long-term prognosis.

Conditional survival and the prognostic value of serum carcinoembryonic antigen level in oldest old with colorectal cancer

BACKGROUND

To evaluate the clinical value of serum CEA levels and their implications on the diagnostic value of the conventional TNM staging system in the oldest-old patients with colorectal cancer (CRC).

METHODS

The recruited subjects were colorectal cancer patients aged 85 and older. The cutoff value for normal CEA level is 5 ng/mL. Patients with elevated CEA levels were categorized as stage C1, and those with normal CEA levels as stage C0. A number of Cox proportional hazard regression models were established to evaluate the prognosis of different prognostic factors with hazard ratios (HRs) and 95% confidence intervals (CIs). The Kaplan-Meier method was utilized to display the disparate prognostic impact of multiple clinicopathological factors with the log-rank test.

RESULTS

A total of 17,359 oldest-old patients diagnosed with CRC were recruited from the SEER database. The conditional survival of oldest-old patients with CRC was dismal with a 1-year conditional survival of only 11%, 18%, and 30% for patients surviving 1, 3, and 5 years, respectively. Patients with stage C1 exhibited a 48.5% increased risk of CRC-specific mortality compared with stage C0 (HR = 1.485, 95%CI = 1.393-1.583, using stage C0 patients as the reference, P < 0.001). All the stage C0 patients indicated lower HRs relative to the corresponding stage C1 patients.

CONCLUSIONS

Dismal conditional survival of oldest-old patients with CRC should be given additional consideration. C stage influences the prognosis of oldest-old patients with CRC.

Real-World Evidence of FOLFIRI Combined with Anti-Angiogenesis Inhibitors or Anti-EGFR Antibodies for Patients with Early Recurrence Colorectal Cancer After Adjuvant FOLFOX/CAPOX Therapy: A Japanese Claims Database Study

BACKGROUND

Oxaliplatin-containing adjuvant regimens (folinic acid, fluorouracil, and oxaliplatin/capecitabine and oxaliplatin [FOLFOX/CAPOX]) are used after curative resection of colorectal cancer (CRC). However, real-world evidence regarding treatment sequences and outcomes in patients with early recurrence CRC after adjuvant chemotherapy is limited.

OBJECTIVE

We aimed to describe the patient characteristics, treatment sequence, and overall duration of second-line (2L) therapy in patients with early recurrence CRC who received adjuvant chemotherapy (FOLFOX/CAPOX) followed by folinic acid, fluorouracil, and irinotecan (FOLFIRI) + anti-angiogenesis drugs (AA) or FOLFIRI + anti-epidermal growth factor receptor (EGFR) antibodies.

METHODS

This retrospective study analyzed Japanese administrative data from November 2014 to March 2023 of adult patients who underwent CRC resection surgery, started FOLFOX/CAPOX ≤3 months (mo) after surgery, and had early CRC recurrence. Early recurrence was defined as initiation of FOLFIRI+AA or FOLFIRI+anti-EGFR antibodies as 2L therapy, ≤12 mo of discontinuing adjuvant chemotherapy. Patient characteristics, treatment sequence, median time to treatment discontinuation (mTTD), i.e., duration between the start and end dates of 2L therapy (Kaplan-Meier method), and factors associated with 2L time to treatment discontinuation constituted the study outcomes (Cox regression model). Subgroup analyses were performed for timing of early CRC recurrence (≤6 mo and 6-12 mo) and tumor sidedness.

RESULTS

Among the 832 selected patients (median age [minimum-maximum] 67 (24-86) years, 56.4% male), CAPOX (71.3%) was more commonly used than FOLFOX (28.7%) as adjuvant therapy. FOLFIRI+AA (72.5%) was used more commonly than FOLFIRI+anti-EGFR antibodies (27.5%) in 2L. AA and anti-EGFR antibodies groups had similar mTTD: 6.2 mo (95% confidence interval 5.8, 6.9) and 6.1 mo (95% confidence interval 5.2, 7.4). Age ≥70 years showed significant association with shorter 2L treatment duration (hazard ratio 1.2, 95% confidence interval 1.0, 1.4; p = 0.03). The AA cohort's mTTD was numerically shorter in the ≤6 mo recurrence subgroup compared with the 6-12 mo recurrence subgroup (6.1 mo vs 8.1 mo); the anti-EGFR antibodies cohort had similar mTTD (5.8 mo vs 6.2 mo). The AA and anti-EGFR antibodies cohorts also had similar mTTD in the left-sided CRC subgroup (6.5 mo vs 6.2 mo), but not in the right-sided subgroup (5.6 mo vs 3.9 mo).

CONCLUSIONS

This is the first administrative data-based real-world evidence on treatment sequence and outcomes for patients with early recurrence CRC treated with FOLFIRI+AAs or FOLFIRI+ anti-EGFR antibodies after adjuvant FOLFOX/CAPOX therapy in Japan. Both regimens had similar TTD, but relapse timing and tumor sidedness may influence their efficacy.

Evaluating Surgical Outcomes and Survival in Colon Cancer Patients Over 80 Years Old

BACKGROUND AND AIMS

In the context of an increasing older population, knowing the surgical outcomes of older patients is of paramount importance to define a comprehensive strategy for colon cancer treatment in these patients. This study aimed to analyze the surgical outcomes and survival of patients over 80 years old undergoing surgery for colon cancer.

MATERIALS AND METHODS

This is an observational retrospective longitudinal study of patients over 80 years old with colon cancer diagnosis who underwent surgery for this condition, between 2018 and 2021, in a Portuguese hospital. Demographic and clinical features were characterized. Kaplan-Meier method was used for survival analysis.

RESULTS

Out of 90 patients in the study, 41.1% were female. The majority (56.7%) had an Eastern Cooperative Oncology Group (ECOG) performance status of 1 or 0, with a median Charlson Comorbidity Index of 7.0. Tumors were primarily located in the right colon (52.2%) and sigmoid colon (25.6%), with most patients having stage II (35.6%) or stage III (25.5%) disease. Elective surgeries accounted for 73% of procedures, and 80.0% had curative intent, with laparoscopic surgery performed in 66.7% of cases. Only 8.3% of those undergoing curative-intent procedures received adjuvant chemotherapy. Emergent admissions were associated with more advanced cancer stages, higher rates of palliative intent procedures (45.8% versus 10.6%, p < 0.001), and more open surgeries (75.0% versus 9.1%, p < 0.001) when compared to elective procedures. Postoperative mortality was higher in the emergent group (20.8% versus 10.6%), though there was no association between the type of admission and postoperative complications. Median overall survival for all patients was 36.7 (95% CI 28.1 to 45.3) months, with significant differences between curative-intent and palliative surgeries (median of 39.8 (95% CI 32.6 to 47.0) versus 10.6 (95% CI 0.67 to 20.5) months, p = 0.015). The elective group of patients had significantly better overall survival compared to the emergent group (median of 36.7 (95% CI 30.7 to 42.7) versus 11.9 (95% CI 6.0 to 17.8) months, p = 0.01). Among the patients who underwent curative-intent procedures, there were no significant differences in overall or disease-free survival between elective and emergent groups.

CONCLUSIONS

Despite the increased complexity of managing older patients, particularly in emergent cases, these findings emphasize the importance of elective, curative-intent surgeries to optimize overall survival. Effective treatment strategies and perioperative management tailored to this age group are essential for improving surgical outcomes and extending survival in elderly colon cancer patients.

Analysis of risk factors for the sigmoid stoma complications in patients after abdominoperineal resection surgery: An observational study

To analyze the risk factors for intraperitoneal sigmoid stoma complications after abdominoperineal resection (APR) surgery to guide clinical practice. Patients who were diagnosed with rectal cancer and underwent APR surgery from June 2013 to June 2021 were retrospectively enrolled. The characteristics of the stoma complication group and the no stoma complication group were compared, and univariate and multivariate logistic analyses were employed to identify risk factors for sigmoid stoma-related complications. A total of 379 patients who were diagnosed with rectal cancer and underwent APR surgery were enrolled in this study. The average age of the patients was 61.7 ± 12.1 years, and 226 (59.6%) patients were males. Patients in the short-term stoma complication group were younger (55.7 vs 62.0, P < .05) and had a more advanced tumor stage (P < .05). However, there was no significant difference between the long-term stoma complication group and the no stoma complication group. Multivariate logistic regression analysis revealed that operation time was an independent risk factor (P < .05, OR = 1.005, 95% CI = 1.000-1.010) for short-term stoma complications. Both the short-term and long-term stoma complication rates in our institution were low. A longer operation time was an independent risk factor for short-term stoma complications after APR surgery.

The impact of WeChat online education and care on the mental distress of caregivers and satisfaction of elderly postoperative colorectal cancer patients

OBJECTIVE

WeChat-based nursing interventions alleviate mental distress. This study intended to investigate the effect of WeChat online education and care (WOEC) on the mental health of caregivers and the satisfaction of elderly postoperative colorectal cancer (CRC) patients.

METHODS

In total, 92 elderly postoperative CRC patients and 92 caregivers were randomly separated into the WOEC group (46 patients and 46 caregivers) and the control care group (46 patients and 46 caregivers). Caregivers received corresponding intervention for 8 weeks. Beck depression inventory (BDI) and beck anxiety inventory (BAI) of caregivers, and self-report satisfaction (SRS) of patients were assessed.

RESULTS

In caregivers, BDI scores at 8 weeks after enrollment (W8) (P = 0.024) and BAI score at W8 (P = 0.009), depression severity at W8 (P = 0.036), as well as anxiety severity at 4 weeks after enrollment (W4) (P = 0.028) and W8 (P = 0.047) were declined in the WOEC group versus the control care group. Regarding patients, SRS scores at W4 (P = 0.044) and W8 (P = 0.025), the satisfaction degree at W4 (P = 0.033) and W8 (P = 0.034), as well as the satisfied and very satisfied rates at W4 (P = 0.031) and W8 (P = 0.029) were elevated in the WOEC group versus the control care group. By subgroup analyses, WOEC exhibited favorable effects on reducing mental stress in caregivers of patients with eastern cooperative oncology group performance status at enrollment <3, and in caregivers with an education level of high school & university and above.

CONCLUSION

WOEC effectively relieves mental stress in caregivers of elderly postoperative CRC patients, and also elevates satisfaction in these patients.

Evaluation and Application of Frailty Index in Colorectal Cancer: A Comprehensive Review

Colorectal cancer (CRC) is a common malignant tumor that primarily affects the elderly population. Surgery is one of the main treatment modalities for CRC. Frailty is a prevalent characteristic among the elderly and a leading cause of mortality. The frailty index (FI) is a comprehensive tool for assessing patients' frailty status, quantifying indicators such as weight loss, fatigue, and nutritional status, to reflect the degree of frailty. In recent years, the FI has undergone modifications to more accurately evaluate the risk of surgical complications and prognosis in CRC patients. This review summarizes the methods for frailty assessment, the development and modifications of the FI, and compiles the research findings and applications of the FI in predicting surgical complications, postoperative recovery, and survival rates in CRC patients. Furthermore, limitations in the current modified frailty index (mFI) and future research directions are discussed. This review provides essential references for further understanding the role of frailty in CRC patients and the clinical application of the mFI.

Mortality and morbidity after colorectal cancer resection surgery in elderly patients: a retrospective population-based study in Sweden

BACKGROUND

Colorectal cancer is primarily a condition of older adults, and surgery is the cornerstone of treatment. As life expectancy is increasing and surgical techniques and perioperative care are developing, curative surgery is often conducted even in ageing populations. However, the risk of morbidity, functional decline, and mortality following colorectal cancer resection surgery are known to increase with increasing age. This study aims to describe real-world data about postoperative mortality and morbidity after resection surgery for colorectal cancer in the elderly (≥ 70 years) compared to younger patients (< 70 years), in a Swedish setting.

METHODS

A cohort study including all patients diagnosed with colorectal cancer in a Swedish region of 1.7 million inhabitants between January 2016 and May 2020. Patients were identified through the Swedish Colorectal Cancer Registry, and all baseline and outcome variables were extracted from the registry. The following outcome measures were compared between the two age groups: 90-day mortality rates, postoperative complications, postoperative intensive care, reoperations, readmissions, and 1-year mortality. To adjust the analyses for baseline confounders in the comparison of the outcome variables, the following methods were used: marginal matching, calliper (ID matching), and logistic regression adjusted for baseline confounders.

RESULTS

The cohort consisted of 5246 patients, of which 3849 (73%) underwent resection surgery. Patients that underwent resection surgery were significantly younger than those who did not (mean ± SD, 70.9 ± 11.4 years vs 73.7 ± 12.8 years, p < 0.001). Multivariable analyses revealed that both 90-day and 1-year mortality rates were higher in older patients that underwent resection surgery (90-day mortality OR 2.12 [95% CI 1.26-3.59], p < 0.005). However, there were no significant differences in postoperative intensive care, postoperative complications, reoperations, or readmissions.

CONCLUSION

Elderly patients suffer increased postoperative mortality after resection surgery for colorectal cancer compared to younger individuals. Given the growing elderly population that will continue to require surgery for colorectal cancer, more efficient ways of determining and handling individual risk for older adults need to be implemented in clinical practice.

Impact of laparoscopic surgery on short-term and long-term outcomes in elderly obese patients with colon cancer

Background

Laparoscopic surgery is reported to be useful in obese or elderly patients with colon cancer, who are at increased risk of postoperative complications because of comorbidities and physical decline. However, its usefulness is less clear in patients who are both elderly and obese and may be at high risk of complications.

Methods

Data for obese patients (body mass index ≥25) who underwent laparoscopic or open surgery for stage II or III colon cancer between January 2009 and December 2013 were collected by the Japan Society of Laparoscopic Colorectal Surgery. Surgical outcomes, postoperative complications, and relapse-free survival (RFS) were compared between patients who underwent open surgery and those who underwent laparoscopic surgery according to whether they were elderly (≥70 y) or nonelderly (<70 y).

Results

Data of 1549 patients (elderly, n = 598; nonelderly, n = 951) satisfied the selection criteria for analysis. Length of stay was shorter and surgical wound infection was less common in elderly obese patients who underwent laparoscopic surgery than in those underwent open surgery. There were no significant between-group differences in overall complications, anastomotic leakage, ileus/small bowel obstruction, or RFS. There were also no significant differences in RFS after laparoscopic surgery according to patient age.

Conclusion

Laparoscopic surgery is safe in elderly obese patients with colon cancer and does not worsen their prognosis. There was no significant difference in the effectiveness of laparoscopic surgery between obese patients who were elderly and those who were nonelderly.

Construction of a novel nomogram based on competing endogenous RNAs and tumor-infiltrating immune cells for prognosis prediction in elderly patients with colorectal cancer

Competitive endogenous RNAs (ceRNAs) and tumor-infiltrating immune cells play essential roles in colorectal cancer (CRC) tumorigenesis. However, their prognostic role in elderly patients with CRC is unclear. Gene expression profiles and clinical information for elderly patients with CRC were downloaded from The Cancer Genome Atlas. Univariate, LASSO, and multivariate Cox regression analyses were utilized for screening key ceRNAs and prevent overfitting. A total of 265 elderly patients with CRC were included. We constructed a novel ceRNA network consisting of 17 lncRNAs, 35 miRNAs, and 5 mRNAs. We established three prognosis predictive nomograms based on four key ceRNAs (ceRNA nomogram), five key immune cells (immune cell nomogram), and their combination (ceRNA-immune cell nomogram). Among them, the ceRNA-immune cell nomogram had the best accuracy. Furthermore, the areas under the curve of the ceRNA-immune cell nomogram were also significantly greater than the TNM stage at 1 (0.818 vs. 0.693), 3 (0.865 vs. 0.674), and 5 (0.832 vs. 0.627) years. Co-expression analysis revealed that CBX6 was positively correlated with activated dendritic cells (R = 0.45, p < 0.01), whereas negatively correlated with activated mast cells (R =- 0.43, p < 0.01). In conclusion, our study constructed three nomograms to predict prognosis in elderly patients with CRC, among which the ceRNA-immune cell nomogram had the best prediction accuracy. We inferred that the mechanism underlying the regulation of activated dendritic cells and mast cells by CBX6 might play a crucial role in tumor development and prognosis of elderly patients with CRC.

A nomogram for individually predicting the overall survival in colonic adenocarcinoma patients presenting with perineural invasion: a population study based on SEER database

Background

Colonic adenocarcinoma, representing the predominant histological subtype of neoplasms in the colon, is commonly denoted as colon cancer. This study endeavors to develop and validate a nomogram model designed for predicting overall survival (OS) in patients with colon cancer, specifically those presenting with perineural invasion (PNI).

Methods

The Surveillance, Epidemiology, and End Results (SEER) database supplied pertinent data spanning from 2010 to 2015, which facilitated the randomization of patients into distinct training and validation cohorts at a 7:3 ratio. Both univariate and multivariate analyses were employed to construct a prognostic nomogram based on the training cohort. Subsequently, the nomogram's accuracy and efficacy were rigorously evaluated through the application of a concordance index (C-index), calibration plots, decision curve analysis (DCA), and receiver operating characteristic (ROC) curves.

Results

In the training cohorts, multivariable analysis identified age, grade, T-stage, N-stage, M-stage, chemotherapy, tumor size, carcinoembryonic antigen (CEA), marital status, and insurance as independent risk factors for OS, all with P-values less than 0.05. Subsequently, a new nomogram was constructed. The C-index of this nomogram was 0.765 (95% CI: 0.755-0.775), outperforming the American Joint Committee on Cancer (AJCC) TNM staging system's C-index of 0.686 (95% CI: 0.674-0.698). Calibration plots for 3- and 5-year OS demonstrated good consistency, while DCA for 3- and 5-year OS revealed excellent clinical utility in the training cohorts. Comparable outcomes were observed in the validation cohorts. Furthermore, we developed a risk stratification system, which facilitated better differentiation among three risk groups (low, intermediate, and high) in terms of OS for all patients.

Conclusion

In this study, we have devised a robust nomogram and risk stratification system to accurately predict OS in colon cancer patients exhibiting PNI. This innovative tool offers valuable guidance for informed clinical decision-making, thereby enhancing patient care and management in oncology practice.

Variations in colorectal cancer pattern of care by age and comorbidity in South Australia

BACKGROUND

Advanced age is associated with decreased likelihood of colorectal cancer treatment. Here, we investigated the extent to which comorbidities are accountable for this lesser treatment.

METHODS

Using population-based datasets, the pattern of care among CRC cases in South Australia during 2004-2013 was investigated. Models were used to investigate associations of age with each treatment type, and differences in these associations were explored by comorbidity and cancer site.

RESULTS

The presence of comorbidity was associated with a significantly weaker relationship of age with surgery and chemotherapy. The association of age with surgery also varied for colon and rectal primary cancer sites. Individual comorbidity types varied in their associations with each treatment category. For example, dementia was associated with less chemotherapy provision, however, it was not significantly related to the likelihood of surgery.

CONCLUSION

This study indicates that the association of age with surgical treatment differed significantly by the CRC subsite. Comorbidity moderated the negative association of age with chemotherapy, and less so, with extent of surgery. Results were novel in indicating associations of multiple individual comorbidity types with CRC treatment modalities. The data suggest that different individual comorbidity types may have different effects on treatment and should be studied separately.

METTL3-mediated Hsa_circ_0000390 downregulation enhances the proliferation, migration, and invasion of colorectal cancer cells by increasing Notch1 expression

Circular RNAs (circRNAs), as noncoding RNAs, have gained widespread attention in cancers. Circ_0000390 has been verified to be downregulated in gastric cancer, while its function and regulatory mechanism in cancer is largely unknown. The purpose of this study is to investigate the expression, functions, and potential mechanism of circ_0000390 in colorectal cancer (CRC). Circ_0000390 expression in CRC tissues was first identified with RT-qPCR. Besides, the function of circ_0000390 was assessed through gain-of-function and rescued experiments in CRC cells and mouse xenograft models. Our results showed that circ_0000390 was lowly expressed in CRC tissues, and circ_0000390 could downregulate Notch1 and be downregulated by METTL3. Functionally, results showed circ_0000390 overexpression suppressed the proliferation, cell migration, and invasion of CRC cells, which also could be reversed by Notch1 overexpression. Additionally, METTL3 overexpression could accelerate the proliferation, cell migration, and invasion of CRC cells, which also was weakened by circ_0000390 overexpression in CRC cells in vitro and in vivo. This study suggested that circ_0000390 might be anti-tumor factor in CRC and METTL3/Notch1 might be a therapeutic targets for CRC.

The safety and prognosis of radical surgery in colorectal cancer patients over 80 years old

OBJECTIVE

The purpose of this study was to assess the safety and feasibility of radical surgery and to investigate prognostic factors influencing in colorectal cancer (CRC) patients over the age of 80.

METHODS

Between January 2010 and December 2020, 372 elderly CRC patients who underwent curative resection at the National Cancer Center were enrolled in the study. Preoperative clinical characteristics, perioperative outcomes, and postoperative pathological features were all collected.

RESULTS

A total of 372 elderly patients with colorectal cancer were included in the study, including 226 (60.8%) men and 146 (39.2%) women. A total of 219 (58.9%) patients had a BMI < 24 kg/m², and 153 (41.1%) patients had a BMI ≥ 24 kg/m². The mean operation time and intraoperative blood loss were 152.3 ± 58.1 min and 67.6 ± 35.4 ml, respectively. The incidence of overall postoperative complications was 28.2% (105/372), and the incidence of grade 3-4 complications was 14.7% (55/372). In the multivariable Cox regression analysis, BMI ≥ 24 kg/m² (HR, 2.30, 95% CI, 1.27-4.17; P = 0.006) and N1-N2 stage (HR: 2.97; 95% CI, 1.48-5.97; P = 0.002) correlated with worse CSS.

CONCLUSION

The findings of this study showed that radical resection for CRC is safe and feasible for patients over the age of 80. After radical resection, BMI and N stage were independent prognostic factors for elderly CRC patients.

Efficacy of Neutrophil-to-Lymphocyte Ratio for Cancer-Specific Survival in Elderly Patients with Localized Colon Cancer: A Single Center Propensity Score-Matched Analysis

Purpose

The prognostic value of neutrophil-to-lymphocyte ratio (NLR) has been studied for colorectal cancer. Elderly patients in general tend to have comorbidities and decreased organ function that potentially influence the NLR score. The aim of this study was to investigate the relationship between NLR and cancer-specific survival in elderly patients with colon cancer, using a propensity score-matched analysis.

Patients and Methods

A total of 203 patients aged over 75 years who underwent curative resection for colon cancer and were diagnosed pathologically with stage II/III disease were eligible for entry to the study. Patients were divided into two groups according to NLR score: NLR-High (NLR≥4.5) group (NLR-H, n=60) and NLR-Low (NLR<4.5) group (NLR-L, n=143). After propensity score matching, 57 patients in each group were matched.

Results

Before matching, Charlson comorbidity index was significantly higher in the NLR-H group (4 vs 2, p<0.001). After matching, all factors were similar between the groups. The median follow-up period was 43 months (range, 1-160 months). Five-year relapse-free-survival (69.8% vs 87.3%, p=0.030) and cancer-specific survival (83.0% vs 96.0%, p=0.042) were significantly lower in the NLR-H group.

Conclusion

NLR appears to be a cancer-specific prognostic marker in elderly patients with colon cancer.

Non-steroidal anti-inflammatory drugs and biomarkers: A new paradigm in colorectal cancer

Colorectal cancer is a sporadic, hereditary, or familial based disease in its origin, caused due to diverse set of mutations in large intestinal epithelial cells. Colorectal cancer (CRC) is a common and deadly disease that accounts for the 4^th worldwide highly variable malignancy. For the early detection of CRC, the most common predictive biomarker found endogenously are KRAS and ctDNA/cfDNA along with SEPT9 methylated DNA. Early detection and screening for CRC are necessary and multiple methods can be employed to screen and perform early diagnosis of CRC. Colonoscopy, an invasive method is most prevalent for diagnosing CRC or confirming the positive result as compared to other screening methods whereas several non-invasive techniques such as molecular analysis of breath, urine, blood, and stool can also be performed for early detection. Interestingly, widely used medicines known as non-steroidal anti-inflammatory drugs (NSAIDs) to reduce pain and inflammation have reported chemopreventive impact on gastrointestinal malignancies, especially CRC in several epidemiological and preclinical types of research. NSAID acts by inhibiting two cyclooxygenase enzymes, thereby preventing the synthesis of prostaglandins (PGs) and causing NSAID-induced apoptosis and growth inhibition in CRC cells. This review paper majorly focuses on the diversity of natural and synthetic biomarkers and various techniques for the early detection of CRC. An approach toward current advancement in CRC detection techniques and the role of NSAIDs in CRC chemoprevention has been explored systematically. Several prominent governing mechanisms of the anti-cancer effects of NSAIDs and their synergistic effect with statins for an effective chemopreventive measure have also been discussed in this review paper.

Surgery for T4 Colorectal Cancer in Older Patients: Determinants of Outcomes

Background: This study aimed to compare the outcomes of older and younger patients with T4 colorectal cancer (CRC) treated with surgery. Methods: Consecutive patients with T4 CRC treated surgically at Henri Mondor Hospital between 2008 and 2016 were retrospectively analyzed in age subgroups (1) 50−69 years and (2) ≥70 years for overall and relative survival. The multivariable analyses were adjusted for adjusted for age, margin status, lymph node involvement, CEA level, postoperative complications (POC), synchronous metastases, and type of surgery. Results: Of 106 patients with T4 CRC, 57 patients (53.8%) were 70 years or older. The baseline characteristics were generally balanced between the two age groups. Older patients underwent adjuvant therapy less commonly (42.9 vs. 57.1%; p = 0.006) and had a longer delay between surgery and chemotherapy (median 40 vs. 34 days; p < 0.001). A higher trend for POC was reported among the older patients but did not impact the survival outcomes. After adjusting for confounding factors, the overall survival was shorter among the older patients (HR = 3.322, 95% CI 1.49−7.39), but relative survival was not statistically correlated to the age group (HR = 0.873, 95% CI 0.383−1.992). Conclusions: Older patients with CRC were more prone to severe POC, but age did not impact the relative survival of patients with T4 colorectal cancer. Older patients should not be denied surgery based on age alone.

Clinical spectrum of rectal cancer identifies hallmarks of early-onset patients and next-generation treatment strategies

BACKGROUND

The incidence of colorectal cancer is increasing among young adults and more rectal cancers are reported. This study aimed to identify the clinical features specific for early-onset rectal cancer and provide insights on cancer management.

METHODS

Early-onset (<50 years) and late-onset (≥50 years) rectal cancer patients from a referral tertiary care center (SYSU cohort) and Surveillance Epidemiology and End Results database (SEER cohort) were included to perform a comprehensive comparison on clinical information.

RESULTS

A total of 552 and 80,341 patients with stages I-III rectal cancer were included in the SYSU and SEER cohorts, respectively. In the SYSU cohort, early-onset diseases had significantly higher prevalence of family history of cancer and history of HBV infection and lower incidence of comorbidities (p < 0.05). In addition, early-onset patients presented more frequently with advanced node stage (N2 stage: 16.9 vs. 9.3%, p = 0.017) and high-risk features, including mucinous or signet cell carcinomas (21.8 vs. 12.9%, p = 0.014), poorly differentiated tumors (28.8 vs. 15.4%, p = 0.002), and perineural invasion (14.5 vs. 7.9%, p = 0.027) compared with late-onset patients. However, early-onset patients received more neoadjuvant (18.5 vs. 11.2%, p = 0.032) and adjuvant treatments (71.0 vs. 45.8%, p < 0.001), and they had better overall survival in both SYSU (HR 0.57, 95% CI: 0.34-0.95; p = 0.029) and SEER (HR 0.38, 95% CI: 0.37-0.40; p < 0.001) cohorts.

CONCLUSION

Early-onset rectal cancers are distinct from late-onset cases in clinicopathological features, treatment modalities, and outcomes. The clinical trials and studies that are specific for young populations are needed to develop optimal strategies for cancer screening, treatment, and surveillance.

Geriatric Nutritional Risk Index and Survival of Patients With Colorectal Cancer: A Meta-Analysis

Background

Geriatric nutritional risk index (GNRI) is an indicator of nutritional status derived by serum albumin level and ideal body weight, which has been proposed as a predictor of prognosis for elderly population with various clinical conditions. The objective of the meta-analysis was to comprehensively evaluate the association between baseline GNRI and survival of patients with colorectal cancer (CRC).

Methods

Cohort studies were identified by search of PubMed, Embase, and Web of Science databases from inception to January 05, 2022 according to the aim of the meta-analysis. A random-effect model incorporating the potential between-study heterogeneity was adopted to pool the results.

Results

Nine studies including 3658 patients with CRC contributed to the meta-analysis. Results showed that CRC patients with lower GNRI at baseline had worse overall survival (OS, hazard ratio [HR] 2.39, 95% confidence interval [CI] 1.78-3.23, p<0.001; I2 = 60%) and progression-free survival (PFS, HR 1.77, 95% CI 1.38-2.26, p<0.001; I2 = 33%). The results were consistent in sensitivity analyses limited to elderly patients (HR for OS 2.25, p<0.001; HR for PFS 1.65, p=0.003). Subgroup analyses showed consistent results in patents with different cancer stages, and in studies with median follow-up < and ≥ 5 years (p for subgroup effects all < 0.05).

Conclusion

A lower GNRI at baseline may be independent associated with poor survival outcomes of patients with CRC. Evaluating the nutritional status using GNRI may be important for risk stratification of patients with CRC.

The Impact of Palliative Care and Nursing Intervention on the Psychology and Quality of Life of Elderly Patients with Colorectal Cancer

Colorectal cancer patients face physical, psychological, and social difficulties. Psychosocial therapies appear to be successful in improving cancer patients' psychological and social results. Preoperative and postoperative psychological therapies for colorectal surgery patients have not been extensively studied. During their treatment, up to 35% of cancer patients experience clinically severe psychological discomfort. As a consequence, a greater knowledge of health-related quality of life and its causes can assist oncology nurses in developing effective treatments to improve the health-related quality of life. The palliative care model and the nursing intervention model are used in this study to assess the effectiveness of an individually customized nursing intervention for lowering chemotherapy-related symptom distress in adult patients with colorectal cancer. Initially, the dataset is collected and split into the control group and the experimental group. The patient conditions are evaluated using the novel accelerated gradient boosting regression tree (AGBRT) estimation model. For improving the evaluation process, we have proposed the enriched gravitational search optimization algorithm (EGSOA). The system's success is evaluated in terms of the patients' psychological well-being and quality of life.

Efficacy and safety of FOLFIRI/aflibercept (FA) in an elderly population with metastatic colorectal cancer (mCRC) after failure of an oxaliplatin-based regimen

Background

The VELOUR study showed the benefit of FOLFIRI-Aflibercept (FA) versus FOLFIRI in patients with metastatic colorectal cancer (mCRC) in second-line treatment. However, only 36% of the included patients were ≥65 years. Thus, we seek to evaluate the efficacy and safety of FA in the elderly population in the context of routine practice.

Materials and methods

We conducted an observational, retrospective, multicenter, observational study of patients ≥70 years with mCRC treated with FA after progression to oxaliplatin chemotherapy in routine clinical practice in 9 hospitals of the GITuD group.

Results

Of 388 patients treated with FA between June 2013 and November 2018, 75 patients ≥70 years were included. The median number of cycles was 10 and the objective response (ORR) and disease control rates (DCR) were 33.8% and 72.0%, respectively. With a median follow-up of 27.1 months, median Progression-free survival (PFS) was 6.6 months and median Overall Survival (OS) was 15.1 months. One third fewer metastasectomies were performed in the ≥75 years’ subgroup (24 vs. 52%, p = 0.024) and more initial FOLFIRI dose reductions (68 vs. 36%, p = 0.014). ORR (23.8% vs. 38.3%), DCR (42.8% vs. 85.1%), and PFS (4 vs. 7.8 months; p = 0.017) were significantly less, without difference in OS (9.9 vs. 17.1 months; p = 0.129). The presence of prior hypertension (HT) (PFS 7.9 vs. 5.7 months, p = 0.049) and HT ≥ grade 3 during treatment (PFS 7.6 vs. 6.6 months, p = 0.024) were associated with longer PFS. The most frequent grade 3/4 adverse events were: asthenia (21.3%), neutropenia (14.7%), and diarrhea (14.7%). 57.3% required FOLFIRI dose reduction; 34.7% of aflibercept, including discontinuation (5.3% and 18.7%, respectively).

Conclusions

FA combination is effective in patients ≥70 years. The occurrence of HT is predictive of efficacy. Close monitoring of toxicity and initial dose adjustment is recommended.

Total Risk Points Predict Short- and Long-term Outcomes Following Colorectal Cancer Resection in Older Patients

BACKGROUND/AIM

Estimation of physiological ability and surgical stress (E-PASS) is reported to be useful as a predictor of postoperative complications and poor long-term survival after colorectal cancer. The total risk points (TRP) system is a simplified scoring system of E-PASS, and this study evaluated the utility of TRP in colorectal cancer resection in older patients.

PATIENTS AND METHODS

The clinicopathological data of 237 patients who underwent curative resection for colorectal cancer from 2015 to 2020 were analyzed retrospectively. The data were compared between a high TRP group (≥1,000, n=38) and a low TRP group (<1,000, n=199). We also conducted an analysis to determine risk factors of postoperative complications and poor long-term survival.

RESULTS

TRP showed statistically significant correlations with the comprehensive risk score (CRS) of E-PASS (R=0.999, p<0.001). The high TRP group experienced postoperative complications (Clavien-Dindo grade ≥2) more frequently (42.1% vs. 11.1%, p<0.001). Multivariate analysis showed that high TRP [odds ratio (OR)=5.214; 95% confidence interval (95%CI)=2.338-11.629; p<0.001] and age ≥80 (OR=2.760; 95%CI=1.308-5.826; p=0.008) were independent predictors of postoperative complications. Overall survival (OS) was poor in the high TRP group (5-year OS, 61.2% vs. 82.6%, p<0.001) compared with the low TRP group, and in the low prognostic nutritional index (<45) group (5-year OS, 70.9% vs. 86.3%, p=0.013) compared with the high prognostic nutritional index (≥45) group. Multivariate analysis showed that high TRP [hazard ratio (HR)=3.202; 95%CI=1.324-7,745; p=0.010] was an independent prognostic factor for poor OS.

CONCLUSION

Patients aged ≥80 years should be closely monitored regarding postoperative complications. Reducing TRP to less than 1,000 is important to reduce postoperative complications and improve OS.

Effect of oxaliplatin in elderly colon cancer patients with pathological T4 and/or N2 disease: a multicenter, propensity score-matched analysis

PURPOSE

Although adjuvant chemotherapy (AC) using fluoro-pyrimidine and oxaliplatin (FU + oxaliplatin) is recommended after curative resection for locally advanced colon cancer patients, several randomized controlled trials have shown no additional effect of oxaliplatin in patients aged ≥ 70 years. Here, we examined the effectiveness of FU + oxaliplatin on the long-term outcome of old patients with a high risk of recurrence.

METHODS

This multicenter, retrospective study included 346 colon cancer patients diagnosed with pathological T4 and/or N2 disease from 2016 to 2020. They were divided into an old group (≥ 70 years, n = 197) and a young group (< 70 years, n = 167). Propensity score matching was used to minimize selection bias, and 126 patients per group were matched.

RESULTS

Before matching, the rates of poor performance status (p < 0.001) and the presence of comorbidities (76.1% vs. 47.9%, p < 0.001) were higher in the old group. Although all baseline factors were similar between groups, after matching, the AC rate was lower in the old group (45.2% vs. 65.1%, p = 0.002). In the old group, relapse-free (82.2% vs. 55.6% and 69.6%, p < 0.05) and overall survival (83.1% vs. 80.0% and 44.4%, p < 0.05) rates were significantly higher in the AC patients with FU + oxaliplatin than in the AC patients with only FU and the non-AC patients.

CONCLUSION

The selected old colon cancer patients with a high risk of recurrence gained an additional benefit with respect to prognosis from FU + oxaliplatin as AC.

Berberine as a Potential Agent for the Treatment of Colorectal Cancer

Colorectal cancer (CRC) is one of the most commonly diagnosed and deadly malignancies worldwide. The incidence of CRC has been increasing, especially in young people. Although great advances have been made in managing CRC, the prognosis is unfavorable. Numerous studies have shown that berberine (BBR) is a safe and effective agent presenting significant antitumor effects. Nevertheless, the detailed underlying mechanism in treating CRC remains indistinct. In this review, we herein offer beneficial evidence for the utilization of BBR in the management and treatment of CRC, and describe the underlying mechanism(s). The review emphasizes several therapeutic effects of BBR and confirms that BBR could suppress CRC by modulating gene expression, the cell cycle, the inflammatory response, oxidative stress, and several signaling pathways. In addition, BBR also displays antitumor effects in CRC by regulating the gut microbiota and mucosal barrier function. This review emphasizes BBR as a potentially effective and safe drug for CRC therapy.

Comparison of surgical and oncologic outcomes in very elderly patients (≥ 80 years old) and elderly (65-79 years old) colorectal cancer patients: a propensity score matching

Purpose

The purpose of this study was to investigate the short-term outcomes and prognosis of elderly and very elderly colorectal cancer (CRC) patients after primary CRC surgery using propensity score matching (PSM).

Methods

This study retrospectively collected the medical records of CRC patients ≥ 65 years old undergoing primary CRC surgery from Jan 2011 to Jan 2020. Short-term outcomes, overall survival (OS) and disease-free survival (DFS) were compared between very elderly CRC patients (≥ 80 years old) and elderly CRC patients (65–79 years old).

Results

A total of 2084 patients were enrolled for analysis. After PSM, 331 very elderly patients were matched to 331 elderly patients. In terms of short-term outcomes, the very elderly patients had longer postoperative hospital stays (p = 0.007) after PSM. In terms of OS, it was found that age (p < 0.01, HR = 1.878, 95% CI 1.488–2.371), tumor stage (p < 0.01, HR = 1.865, 95% CI 1.603–2.170), overall complications (p < 0.01, HR = 1.514, 95% CI 1.224–1.872) and major complications (p = 0.001, HR = 2.012, 95% CI 1.319–3.069) were independent prognostic factors. For DFS, age (p < 0.01, HR = 1.816, 95% CI 1.579–2.088), tumor stage (p < 0.01, HR = 1.816, 95% CI 1.579–2.088), overall complications (p = 0.002, HR = 1.379, 95% CI 1.128–1.685) and major complications (p = 0.002, HR = 1.902, 95% CI 1.259–2.874) were found to be independent prognostic factors. Moreover, elderly patients had a better OS and DFS than very elderly patients.

Conclusion

Very elderly patients had a poorer prognosis than elderly patients after primary CRC surgery. Surgeons should be cautious when treating very elderly CRC patients.

Overcoming Therapy Resistance in Colon Cancer by Drug Repurposing

Simple Summary

Despite improvements in standardized screening methods and the development of promising therapies for colorectal cancer (CRC), survival rates are still low. Drug repurposing offers an affordable solution to achieve new indications for previously approved drugs that could play a protagonist or adjuvant role in the treatment of CRC. In this review, we summarize the current data supporting drug repurposing as a feasible option for patients with CRC.

Abstract

Colorectal cancer (CRC) is the third most common cancer in the world. Despite improvement in standardized screening methods and the development of promising therapies, the 5-year survival rates are as low as 10% in the metastatic setting. The increasing life expectancy of the general population, higher rates of obesity, poor diet, and comorbidities contribute to the increasing trends in incidence. Drug repurposing offers an affordable solution to achieve new indications for previously approved drugs that could play a protagonist or adjuvant role in the treatment of CRC with the advantage of treating underlying comorbidities and decreasing chemotherapy toxicity. This review elaborates on the current data that supports drug repurposing as a feasible option for patients with CRC with a focus on the evidence and mechanism of action promising repurposed candidates that are widely used, including but not limited to anti-malarial, anti-helminthic, anti-inflammatory, anti-hypertensive, anti-hyperlipidemic, and anti-diabetic agents.

The preoperative geriatric nutritional risk index (GNRI) is an independent prognostic factor in elderly patients underwent curative resection for colorectal cancer

The world is becoming longer-lived, and the number of elderly colorectal cancer patients is increasing. It is very important to identify simple and inexpensive postoperative predictors in elderly colorectal cancer patients. The geriatric nutritional risk index (GNRI) is a marker of systemic nutrition and is associated with poor survival in various kinds of cancers. A few reports have investigated recurrence factors using preoperative GNRI with CRC (colorectal cancer) patients. This study aimed to investigate whether preoperative GNRI is associated with recurrence-free survival (RFS) and overall survival (OS) in elderly patients with CRC. This study retrospectively enrolled 259 patients with Stage I–III CRC who were more than 65 years old and underwent curative surgery at a single institution in 2012–2017. We classified them into low GNRI (RFS: ≤ 90.5, OS ≤ 101.1) group and high GNRI (RFS: > 90.5, OS > 101.1) group. Multivariable analyses showed low GNRI group was an independent risk factor for 3-year RFS (P = 0.006) and OS (P = 0.001) in the patients with CRC. Kaplan–Meier analysis showed 3-year RFS and 3-year OS were significantly worse in the low GNRI group than in high GNRI group (p = 0.001, 0.0037). A low-preoperative GNRI was significantly associated with a poor prognosis in elderly CRC patients.

Frailty and long-term survival of patients with colorectal cancer: a meta-analysis

BACKGROUND

Frailty has been related with the risk of postoperative complication in patients with colorectal cancer (CRC). However, the association between frailty and long-term survival in patients with CRC has not been comprehensively evaluated. We performed a meta-analysis to systematically evaluate the relationship between frailty and long-term survival of these patients.

METHODS

Relevant cohort studies with follow-up duration ≥ 1 year were identified from Medline, Embase, and Web of Science. A random-effect model after incorporation of the between-study heterogeneity was selected to pool the results.

RESULTS

Ten cohort studies with 35,546 patients were included, and 4100 (11.5%) of them had frailty. Pooled results showed that patients with frailty had worse overall survival compared to those without frailty at baseline (relative risk [RR]: 2.21, 95% confidence interval [CI] 1.43-3.41, P < 0.001; I² = 92%). Results were consistent for studies adjusting age (RR: 2.20, P < 0.001) or including older cancer patients only (RR: 2.28, P = 0.002). Subgroup analyses showed that difference in study design, follow-up duration, or study quality scores may not significantly affect the findings (P for subgroup analyses all > 0.05). Further meta-analyses with two datasets showed that frailty was also associated with worse cancer-specific survival (RR: 4.60, 95% CI 2.75-7.67, P < 0.001; I² = 38%) and recurrence-free survival (RR: 1.72, 95% CI 1.30-2.28, P < 0.001; I² = 0%).

CONCLUSIONS

Frailty at admission is associated with worse survival of patients with colorectal cancer.

Short and long-term outcomes of elderly patients undergoing left-sided colorectal resection with primary anastomosis for cancer

BACKGROUND

The proportion of elderly colorectal cancer (CRC) patients requiring surgery is increasing. Colorectal resection for left-sided cancers is the most controversial as the primary anastomosis or end-colostomy and open or minimally invasive approaches are available. Therefore, this study was conducted to investigate the short- and long-term outcomes in elderly patients after resection with primary anastomosis for left-sided CRC.

METHODS

The cohort study included left-sided colorectal cancer patients who underwent resection with primary anastomosis. The participants were divided into non-elderly (≤75 years) and elderly (> 75 years) groups. Short- and long-term postoperative outcomes were investigated.

RESULTS

In total 738 (82%) and 162 (18%) patients were allocated to non-elderly and elderly groups, respectively. Minimally invasive surgery (MIS) was less prevalent in the elderly (42.6% vs 52.7%, p = 0.024) and a higher proportion of these suffered severe or lethal complications (15.4% vs 9.8%, p = 0.040). MIS decreased the odds for postoperative complications (OR: 0.41; 95% CI: 0.19-0.89, p = 0.038). The rate of anastomotic leakage was similar (8.5% vs 11.7%, p = 0.201), although, in the case of leakage 21.1% of elderly patients died within 90-days after surgery. Overall- and disease-free survival was impaired in the elderly. MIS increased the odds for long-term survival.

CONCLUSIONS

Elderly patients suffer more severe complications after resection with primary anastomosis for left-sided CRC. The risk of anastomotic leakage in the elderly and non-elderly is similar, although, leakages in the elderly seem to be associated with a higher 90-day mortality rate. Minimally invasive surgery is associated with decreased morbidity in the elderly.

Short-term and long-term outcomes after laparoscopic surgery for elderly patients with colorectal cancer aged over 80 years: a propensity score matching analysis

PURPOSE

There has been an increase in the percentage of elderly patients with colorectal cancer (CRC). However, few studies have reported the short- and long-term outcomes of laparoscopic surgery for elderly patients with CRC aged over 80 years.

METHODS

This study included 529 patients who underwent laparoscopic resection for clinical stage 0-III CRC at Kobe University Hospital between January 2010 and December 2018. Propensity score matching (PSM) was used to create balanced cohorts of the elderly (aged ≥ 80, n = 113) and the non-elderly (aged < 80, n = 113). Their clinical outcomes were compared after PSM.

RESULTS

After matching, carcinoembryonic antigen (CEA) level was higher in the non-elderly group, and adjuvant chemotherapy was less frequently employed in the elderly group. D3 dissection was performed more frequently and the number of the harvested lymph nodes tended to be larger in the non-elderly group. There was no significant difference in the rates of postoperative complications, reoperation within 30 days, and 30-day mortality between the groups. The 5-year relapse-free survival rate was not statistically different between the two groups (77.3% for the non-elderly vs. 62.7% for the elderly, p = 0.13). The multivariate analyses for the whole cohort showed that the factors of sex, tumor location, operation time, and conversion to open surgery, but not the age, were significant predictors of postoperative complications.

CONCLUSION

Laparoscopic surgery for colorectal cancer patients aged over 80 years is technically and oncologically safe.

Abnormal Dihydropyrimidine Dehydrogenase Activity as an Indicator of Potential 5-Fluorouracil Linked Cardiotoxicity in Colorectal Cancer Patients: Are Toxic Events Inevitable?

Colorectal cancer (CRC) treatment can be limited to surgical resection for low stages of the disease while subsequent chemotherapy is the preferred treatment for the higher-stage disease. This chemotherapy relies heavily on fluoropyrimidine: 5-fluorouracil (5-FU) and capecitabine, a role played for decades. Fluoropyrimidine-linked treatment can present important and even lethal toxic events at the cardiac level like acute coronary syndrome, arrhythmias, and death.

The production of these toxic events depends on the capacity of a subject to metabolize the fluoropyrimidines adequately, and this depends on the activity of the enzyme dihydropyrimidine dehydrogenase (DPD). Any change that affects the quantity or quality of this enzyme will compromise its capacity to metabolize the fluoropyrimidines. The resultant abnormal enzyme activity exposes the patient to continuously high levels of the chemotherapeutic agent or its catabolites. Consequently, the patient becomes more susceptible to pyrimidine-linked toxic adverse events.

Genetic testing of patients for potential decreased DPD activity before subjecting them to fluoropyrimidine-based chemotherapy will help identify subjects at greater risk of increased cardiotoxicities, the possibility of prompt intervention, should these appear, and a multidisciplinary strategy aimed at managing these cases. Potential cases of cardiotoxicity in CRC patients, candidates to fluoropyrimidine toxicities, can be anticipated by pretreatment screening of DPD activity. Pretreatment screening will reduce many hospitalizations with a consequent decrease in costs both to the patients and the healthcare system.

This review article will examine the 5-FU linked cardiotoxicity, known correlated risk factors, clinical manifestations, management strategy, and the role of genetic testing in identifying high-risk patients.

Impairment of Activities of Daily Living is an Independent Risk Factor for Recurrence and Mortality Following Curative Resection of Stage I-III Colorectal Cancer

BACKGROUND

With aging of the population, the number of colorectal cancer patients with impairment of activities of daily living (ADLs) has increased. The Barthel index is a validated tool for assessing functional levels of ADLs. In this retrospective study, we aimed to examine associations of Barthel index scores with recurrence and mortality after curative resection of colorectal cancer.

METHODS

We retrospectively analyzed data of 815 consecutive patients who had undergone curative resection of stage I-III colorectal adenocarcinoma between January 2009 and December 2017. Preoperative functional levels of ADLs were assessed prospectively using the Barthel index (range, 0 to 100; higher scores indicate greater independence). Recurrence-free survival (RFS) and overall survival (OS) were compared according to Barthel index scores. The Cox proportional hazards model was used to calculate hazard ratios (HRs), controlling for potential confounders.

RESULTS

Of the 815 patients, Barthel index scores were 40 or lower in 129 (16%), 41-85 in 110 (13%), and 86 or more in 576 (71%). In multivariable analyses adjusting for potential confounders including age and disease stage, scores of 85 or lower on the Barthel index were independently associated with shorter RFS (multivariable HR: 1.74, 95% confidence interval: 1.28-2.37, P<0.001) and OS (multivariable HR: 2.10, 95% confidence interval: 1.45-3.04, P<0.001).

CONCLUSIONS

Lower scores on the Barthel index are associated with shorter RFS and OS following resection of nonmetastatic colorectal cancer. Further studies are needed to establish treatment strategies for colorectal cancer patients with poor functional capacity.

Early gastrointestinal cancer: The application of artificial intelligence

Early gastrointestinal (GI) cancer has been the core of clinical endoscopic work. Its early detection and treatment are tightly associated with patients’ prognoses. As a novel technology, artificial intelligence has been improved and applied in the field of endoscopy. Studies on detection, diagnosis, risk, and prognosis evaluation of diseases in the GI tract have been in development, including precancerous lesions, adenoma, early GI cancers, and advanced GI cancers. In this review, research on esophagus, stomach, and colon was concluded, and associated with the process from precancerous lesions to early GI cancer, such as from Barrett’s esophagus to early esophageal cancer, from dysplasia to early gastric cancer, and from adenoma to early colonic cancer. A status quo of research on early GI cancers and artificial intelligence was provided.

A Diagnostic Nomogram for Predicting the Risk of Anastomotic Leakage in Elderly Patients With Rectal Cancer: A Single-center Retrospective Cohort Study

BACKGROUND

Laparoscopic resection for rectal cancer has been gaining popularity over the past 2 decades. Whether elderly patients had more benefits from laparoscopy-assisted anterior resection (LAR) need further investigation when comparing with open anterior resection (OAR).

OBJECTIVES

This study aimed to evaluate the clinical outcomes and prognosis of LAR in elderly patients (65 y and above) with rectal cancer and investigate the factors associated with the anastomotic leakage (AL). Besides, the study sought to create a nomogram for precise prediction of AL after anterior resection for rectal cancer.

MATERIALS AND METHODS

A total of 343 rectal cancer patients over 65 years old who underwent LAR or OAR at a single center between January 2013 to January 2021 were retrospectively reviewed. Univariate analysis was conducted to explore potential risk factors for AL, and a nomogram for AL was created based on the multivariate logistic regression model.

RESULTS

A total of 343 patients were included in this study, 271 patients in LAR group and 72 patients in OAR group. Most of the variables were comparable between the 2 groups. The mean operative time was longer in the LAR group than that in the OAR group (191.66±58.33 vs. 156.85±53.88 min, P<0.0001). The LAR group exhibited a significantly lower intraoperative blood loss than the OAR group (85.17±50.03 vs. 131.67±79.10 mL; P<0.0001). Moreover, laparoscopic surgery resulted in shorter postoperative hospital stay, lower rates of diverting stoma and receiving sphincter sparing surgery in comparison with open surgery. The overall rates of complications were 25.1% and 40.3% in the LAR and OAR groups (P=0.011), respectively. And the reoperation rates in the OAR group (0%) was lower than in the LAR group (1.5%), but the difference did not reach statistical significance (P=0.300). Sex, location of tumor, diverting stoma and combined organ resection were identified as independent risk factors for AL based on multivariate analysis. Such factors were selected to develop a nomogram. After a median follow-up of 37.0 months, our study showed no significant difference in overall survival or disease free survival between the 2 groups for treatment of rectal cancer.

CONCLUSIONS

This study suggests that LAR is an alternative minimally invasive surgical procedure in patients above 65 years with better short-term outcomes and acceptable long-term outcomes compared with OAR. In addition, our nomogram has satisfactory accuracy and clinical utility may benefit for clinical decision-making.

Clinical characteristics and survival of colorectal cancer patients in Korea stratified by age

BACKGROUND/AIMS

This nationwide study was undertaken to determine differences in clinicopathologic characteristics and survival of patients with colorectal cancer (CRC) according to age using big data from the Korean National Health Insurance Service (NHIS).

METHODS

The NHIS data including quality assessment of CRC by the Health Insurance Review & Assessment Service in Korea between 2011 and 2014 were analyzed. Based on age, patients were divided into three groups: not-old patients (< 65), young-old patients (65 to 74 years old) and old-old patients (≥ 75 years old).

RESULTS

We included 71,513 CRC patients. The median follow-up duration was 3.2 years (range, 0.003 to 5.5). Male patients constituted 60%. The median age of patients was 65 years (range, 18 to 102). Colon was the cancer site in 59.8% of not-old patients, 62.9% of young-old patients, and 66.1% of old-old patients. Compared to not-old patients, young-old and old-old patients were more likely to be diagnosed with colon adenocarcinoma and well/moderate differentiation or adequate differentiation (all p < 0.001). Old patients underwent more emergency operation (p < 0.001) and received less adjuvant therapy in stage I-III (p < 0.001). The probability of 3-year survival of young-old or old-old patients was worse than that for not-old patients (hazard ratio [HR], 1.55; 95% confidence interval [CI], 1.46 to 1.64) (HR, 3.19; 95% CI, 3.03 to 3.37).

CONCLUSION

Old patients with CRC show different histology from younger patients. They are more frequently to have colon as primary lesion. They undergo less adjuvant therapy. Further studies and evidence-based guidelines for older patients with CRC are warranted to improve their outcome.

Development and external validation of a nomogram predicting overall survival after curative resection of colon cancer

OBJECTIVE

To develop and externally validate a prognostic nomogram to predict overall survival (OS) in patients with resectable colon cancer.

METHODS

Data for 50,996 patients diagnosed with non-metastatic colon cancer were retrieved from the Surveillance, Epidemiology, and End Results (SEER) database. Patients were assigned randomly to the training set (n = 34,168) or validation set (n = 16,828). Independent prognostic factors were identified by multivariate Cox proportional hazards regression analysis and used to construct the nomogram. Harrell's C-index and calibration plots were calculated using the SEER validation set. Additional external validation was performed using a Chinese dataset (n = 342).

RESULTS

Harrell's C-index of the nomogram for OS in the SEER validation set was 0.71, which was superior to that using the 7th edition of the American Joint Committee on Cancer TNM staging (0.59). Calibration plots showed consistency between actual observations and predicted 1-, 3-, and 5-year survival. Harrell's C-index (0.72) and calibration plot showed excellent predictive accuracy in the external validation set.

CONCLUSIONS

We developed a nomogram to predict OS after curative resection for colon cancer. Validation using the SEER and external datasets revealed good discrimination and calibration. This nomogram may help predict individual survival in patients with colon cancer.

Prognostic factors for stage III colon cancer in patients 80 years of age and older

PURPOSE

Oncological strategies in the elderly population are debated. The objective of this study was to assess the factors predictive of poor prognosis in elderly patients with stage III colon cancer.

METHODS

A retrospective review of demographic, pathologic, treatment, and outcome data from 308 patients with stage III colon adenocarcinoma who had undergone surgery between 2007 and 2014 was conducted. A proportional hazards model was used to assess the association of prognostic factors with disease-free survival (DFS) and overall survival (OS).

RESULTS

The 5-year survival rate was 34.4% (95% CI 27.1-39.8%) and Charlson comorbidity index was a significant predictor of death (p < 0.01). The presence of perineural invasion (p = 0.03) and incomplete resection (p < 0.001) were significantly correlated with OS. The postoperative (30 days) mortality rate was 11.7%. Adjuvant chemotherapy was significantly associated with better OS (p < 0.001) independently of the regimens. Disease-free survival was significantly correlated with adjuvant chemotherapy (HR 0.63, 95% CI: 0.42-0.97, p = 0.034), Charlson comorbidity index (CCI 5; HR 1.61, 95% CI: 1.05-2.48, p = 0.029), and venous and/or perineural invasion (HR 1.54, 95% CI: 1.03-2.29, p = 0.035).

CONCLUSION

Age, comorbidities, tumor histology, and adjuvant chemotherapy were independent predictors of prognosis in patients with stage III colon cancer. These data can be used to identify elderly patients with poor prognosis and to design future tailored randomized clinical trials.

TRIAL REGISTRATION

ClinicalTrial.gov No. NCT04526314. Date of registration 25 August 2020.

Outcomes of Laparoscopic Versus Open Surgery in Elderly Patients with Rectal Cancer

Background:

Laparoscopic colorectal resection has been gaining popularity over the past two decades-and the number of elderly patients with colorectal cancer treated with a surgical modality has gradually increased. However, studies about laparoscopic rectal surgery in elderly patients with long-term oncologic outcomes are limited. In this study, we evaluated the safety and effectiveness of laparoscopic resection in patients with rectal cancer aged ≥80 y.

Methods:

From 2007-2015, a total of 84 consecutive patients with rectal cancer from a single institution were included, 45 patients undergoing laparoscopic rectal resection were compared with 39 patients undergoing open rectal resection.

Results:

The two groups were well balanced in terms of age, gender, body mass index, American society of anesthesiologists scores, previous abdominal surgery, neoadjuvant therapy, tumor stage, distance of tumor from the anal verge, and comorbidities. One (2.2%) patient in the laparoscopic group required conversion to open surgery. Laparoscopic surgery was associated with significantly longer operating time (160.1±28.2 versus 148.2±41.3 min; P=0.031), less intraoperative blood loss (80.5±20.9 versus 160.3±42.4 mL; P=0.002), less need of blood transfusion (6.7% versus 20.5%; P=0.003), a shorter time to diet recovery (2.5±1.5 versus 4.9±1.1; P=0.015) and postoperative hospital stay (7.5±4.5 versus 10.8±4.2; P=0.035), lower overall postoperative complication rate (8.9% versus 20.5%; P=0.017), and wound-related complication rate (4.4% versus 10.2%; P=0.013) when compared with open surgery. Specimen length, no. of retrieced lymph nodes, positive distal and circumferential margin rate, mortality rate, and reoperation rate were not significantly different between two groups. The disease-free and overall 5-year survival rates were similar between two groups.

Conclusions:

Laparoscopic rectal surgery is safe and feasible in patients aged≥80 y and is associated with similar long-term oncologic outcomes when compared with open surgery.

The clinical features, management, and survival of elderly patients with colorectal cancer

Background

As the population ages, the number of elderly patients with colorectal cancer is increasing year by year. However, older people have rarely been the focus of studies on colorectal cancer. Therefore, in the present study, we aimed to carry out a retrospective analysis of this patient subgroup.

Methods

A retrospective study of clinical data of patients aged over 80 years who died from colorectal cancer in our hospital between 1993 and 2020 was performed. Logistic regression, the Kaplan-Meier method, and a multivariate Cox proportional hazards model were used to analyze the overall survival and treatment outcomes of the patients.

Results

A total of 87 patients were included in the study. The overall median survival was 45 months. In most patients, the primary lesion was located in the right colon. One-quarter of the patients refused to accept any treatment. Patients with stage IV tumors, who accounted for the largest proportion of the study population, displayed a higher rate of abandoning treatment than did patients of other stages. Almost all patients with stages II and III accepted surgery. Patients who underwent surgery to treat their colorectal cancer had longer survival than those who did not.

Conclusions

Old age should not be a reason for giving up treatment for colorectal cancer. The treatment of colorectal cancer patients aged 80 years and above requires individualized evaluation and more aggressive treatment to achieve greater benefits.

Short- and long-term outcomes of laparoscopic surgery for colorectal cancer in the elderly aged over 80 years old versus non-elderly: a retrospective cohort study

Background

Recently, colorectal cancer has increased in elderly patients worldwide, with laparoscopic colorectal surgery increasing in elderly patients with colorectal cancer. However, whether laparoscopic colorectal surgery is an optimal procedure for colorectal cancer in the elderly remains unclear. This study aimed to verify safety and curability of laparoscopic colorectal surgery in elderly patients ≥80 years old.

Methods

Patients undergoing curative colorectal surgery from 2006 to 2014 were enrolled and classified into the laparoscopic surgery in elderly patients aged ≥80 years (LAC-E) group, open surgery in elderly patients (OC-E) group, and laparoscopic surgery in non-elderly patients (LAC-NE) group. Short- and long-term outcomes were compared between these groups.

Results

The LAC-E, OC-E, and LAC-NE groups comprised 85, 25, and 358 patients, respectively. Intraoperative blood loss and incidence of postoperative complications were significantly lower in the LAC-E versus OC-E group (97 vs. 440 mL, p < .01 and 14% vs. 32%, p < .05, respectively). Long-term outcomes were not different between these two groups. Operation time was significantly shorter in the LAC-E versus LAC-NE group (249 vs. 288 min, p < .01). Intraoperative blood loss and postoperative complications were similar between the groups. Although the 5-year overall survival rate in the LAC-E group was lower than that in the LAC-NE group (64% vs. 80%, p < .01), there was no difference in 5-year disease-specific survival between the groups.

Conclusion

Laparoscopic colorectal surgery is technically and oncologically safe for colorectal cancer in the elderly as well as the non-elderly and can be an optimal procedure for colorectal cancer in the elderly.

Assessment of clinicopathological and prognostic relevance of BMI-1 in patients with colorectal cancer: A meta-analysis

B-cell-specific Moloney leukemia virus insertion site 1 (BMI-1) is one of the stemness markers. The prognostic and clinicopathological effects of BMI-1 expression in colorectal cancer (CRC) have been in dispute with different studies. Eligible studies were retrieved from international databases up to December 2019. Studies with a relationship between the clinicopathological and prognostic value of CRC patients with BMI-1 expression were selected. The correlations in the random-effect model were evaluated using the hazard ratios, odds ratio, and 95% confidence intervals (CIs). A total of nine studies comprising Asian cases (seven studies) and European cases (two studies) covering 1,294 samples of CRC were included for this meta-analysis. The analysis suggested that in Asian cases, increased expression of BMI-1 was associated with poor overall survival (OS) and death-free survival, whereas in European populations, high expression of BMI-1 was associated with better OS. Also, overexpression of BMI-1 in the Asian population was associated with the tumor size, distant metastasis, and patient's gender and age. Results suggested that high expression of BMI-1 can be involved in the progression and invasion of CRC, and so its inhibitor-based therapies could be used to prevent the progression of CRC.

Adjuvant Chemotherapy in Elderly Colorectal Cancer Patients

The value of adjuvant chemotherapy in elderly patients has been the subject of many overviews, with opinions varying from “not effective”, since randomized trials have not been performed, to “as effective as in young individuals”, based upon many retrospective analyses of randomized trials that have included patients of all ages. In the absence of randomized trials performed specifically with elderly patients, retrospective analyses demonstrate that the influence on the time to tumour recurrence (TTR) may be the same as in young individuals, but that endpoints that include death for any reason, such as recurrence-free survival (RFS), disease-free survival (DFS), and overall survival (OS), are poorer in the elderly. This is particularly true if oxaliplatin has been part of the treatment. The need for adjuvant chemotherapy after colorectal cancer surgery in elderly patients is basically the same as that in younger patients. The reduction in recurrence risks may be similar, provided the chosen treatment is tolerated but survival gains are less. Adding oxaliplatin to a fluoropyrimidine is probably not beneficial in individuals above a biological age of approximately 70 years. If an oxaliplatin combination is administered to elderly patients, three months of therapy is in all probability the most realistic goal.

Immune senescence and immune activation in elderly colorectal cancer patients

In our previous study, we found that low thymic output and short telomere length were associated with a higher risk of tumor in elderly cancer patients. Here, we aimed to examine in depth the impact of immunological and biological senescence and immune activation on disease outcome in elderly patients with colorectal cancer (CRC).Peripheral blood samples from 81 CRC patients were studied for immune activation, immune senescence and recent thymic emigrant(RTE) CD4 and CD8 cells by flow cytometry. T-cell receptor rearrangement excision circle (TREC) levels and telomere lengths were measured by real-time PCR. Plasma levels of microbial translocation markers, LPS and sCD14, were quantified by ELISA. While TREC levels and telomere length were not prognostic of disease outcome, high percentages of immune senescent and immune activated CD8 cells were associated with a higher risk of a negative event (relapse, progression, or death) in all studied patients and disease relapse in I-III staged patients. Levels of sCD14 and LPS were higher in patients who will experience a negative event than in patients who will not. In conclusion, in elderly CRC patients higher immunological senescence and immune activation negatively impact the disease outcome; how these characteristics influence the antineoplastic treatments remains to be investigated.

Frailty is an independent risk factor for recurrence and mortality following curative resection of stage I-III colorectal cancer

AIM

With population aging, the number of frail patients with colorectal cancer has increased. The Clinical Frailty Scale (CFS) is a validated tool for assessing frailty, and higher scores indicate worse clinical outcomes following cardiovascular procedures. This retrospective study aimed to examine preoperative frailty in relation to recurrence and mortality following curative resection of colorectal cancer.

METHODS

We retrospectively analyzed data for 729 consecutive patients undergoing curative resection of stage I-stage III colon and rectal adenocarcinoma between January 2009 and December 2016. Frailty was assessed using the CFS: 1 (very fit) to 9 (terminally ill), and frailty was defined as CFS ≥ 4. Recurrence-free survival (RFS) and overall survival (OS) were compared between frail and nonfrail patients. Cox proportional hazards model was used to calculate hazard ratios (HRs), controlling for potential confounders.

RESULTS

CFS score was negatively correlated with the Barthel index of activities of daily living (Spearman's ρ = -0.83). Of the 729 patients, 253 (35%) were frail. In multivariable analyses adjusting for potential confounders including age and disease stage, frailty was independently associated with shorter RFS (multivariable HR: 1.70, 95% confidence interval: 1.25-2.31, P < .001) and OS (multivariable HR: 2.04, 95% confidence interval: 1.40-2.99, P < .001). There were no significant interactions of frailty with age and disease stage regarding RFS and OS (P interaction > .72).

CONCLUSION

Preoperative frailty was independently associated with shorter RFS and OS following resection of nonmetastatic colorectal cancer, regardless of age and disease stage. Further trials are needed to establish treatment strategies for frail patients with colorectal cancer.

Advanced Age Is a Risk Factor for Recurrence After Resection in Stage II Colorectal Cancer

BACKGROUND/AIM

The number of older patients with colorectal cancer (CRC) is increasing. Stage II CRC is a heterogeneous group of cancers with different prognoses. We aimed to examine older patients in relation to clinical outcome following curative resection in stage II CRC.

PATIENTS AND METHODS

We analyzed data for 329 consecutive patients with stage II CRC following curative resection. Recurrence-free survival (RFS) and overall survival (OS) were compared between older patients ≥75 years of age and those <75 years. Cox proportional hazards model was used to compute hazard ratios (HRs) controlling for potential confounders.

RESULTS

In the multivariable analyses, patients ≥75 years were independently associated with shorter RFS (multivariable HR=2.56, 95% confidence interval (CI)=1.55-4.31, p<0.001) and OS (multivariable HR=4.36, 95%CI=2.08-9.97, p<0.001) in stage II CRC.

CONCLUSION

Older patients were independently associated with shorter RFS and OS following curative resection in stage II CRC.