Perioperative and oncologic outcomes in young and octogenarian patients with colorectal cancer: a comparison at the extremes

Surgical risk and cause of death among octogenarian and nonagenarian patients with colorectal cancer: a Japanese multicenter study

BACKGROUND

The number of elderly people undergoing surgery for colorectal cancer has been increasing. We examine prognosis, including risks of surgery by age and cancer- and noncancer-related deaths.

METHODS

This study retrospectively reviewed 1830 patients who underwent curative resection colorectal surgery. Patients were divided into oldest-old (>85 years old, n = 49), elderly (75-84 years old, n = 637), and young (<75 years old, n = 1144) patient groups.

RESULTS

Physical status was poorer (P < .001), postoperative complications were more frequent (49.0% vs. 20.9% vs. 18.4%; P < .001), and adjuvant chemotherapy was less frequent (0% vs. 44.3% vs. 83.5%; P < .001) as patients got older. Multivariate analysis revealed oldest-old [odds ratio (OR) 4.373, 95% confidence interval (CI) 2.362-8.110; P < .001] as independent predictors of postoperative complications. Elderly patients [hazard ratio (HR) 2.494, 95%CI 1.707-3.642; P < .001], oldest-old patients (HR 5.969, 95%CI 3.229-11.035; P < .001), poor physical status (HR 2.546, 95%CI 1.694-3.827; P < .001), and postoperative complications (HR 1.805, 95%CI 1.252-2.602; P = .001) were predictive factors for noncancer-specific survival.

CONCLUSIONS

Elderly patients had many complications and a higher risk of dying from other causes. Surgical risk and general condition must be considered when deciding the appropriateness of surgery and adjuvant therapy.

An internally and externally validated nomogram for predicting cancer-specific survival in octogenarians after radical resection for colorectal cancer

AIMS

We aimed to develop an elaborative nomogram that predicts cancer-specific survival (CSS) in American and Chinese octogenarians treated with radical resection for CRC.

METHODS

The patient data of newly diagnosed patients aged 80 years or older who underwent radical resection for CRC from 2010 to 2015 were extracted from the Surveillance, Epidemiology, and End Results (SEER) database and then randomly divided into a training cohort and a validation cohort. The patients collected from our hospital were defined as the external validation cohort. Univariate and multivariate Cox regression was used to select independent predictive factors for the construction of a nomogram to predict 1-, 2- and 3-year CSS.

RESULTS

The multivariate Cox regression model identified age, T stage, N stage, perineural invasion, chemotherapy, tumour deposits, carcinoembryonic antigen level, number of lymph node metastases, and number of solid organ metastases as independent predictors of survival. The C-index of the nomogram for 1-, 2- and 3-year CSS was 0.758, 0.762, and 0.727, respectively, demonstrating significant clinical value and substantial reliability compared to the TNM stage. The calibration curve and area under the curve also indicated considerable predictive accuracy. In addition, decision curve analysis demonstrated desirable net benefits in clinical application.

CONCLUSION

We constructed a nomogram for predicting the CSS of individual octogenarian patients with CRC who underwent radical resection. The nomogram performed better than the TNM staging system in this particular population and could guide clinicians in clinical follow-up and individual therapeutic plan formulation.

Adjuvant chemotherapy improves survival amongst octogenarians following resection of colorectal adenocarcinoma

BACKGROUND

The Australian population is ageing, with an increasing number of patients diagnosed with colorectal cancer in their eighth decade. This group represents a challenging cohort to deliver multidisciplinary care, with increased morbidity and mortality related to surgical and oncological therapies. This project aimed to compare surgical and oncological outcomes in octogenarian and non-octogenarian patients with colorectal cancer.

METHODS

A matched case-control retrospective review of a prospectively maintained institutional database of colorectal cancer patients treated between 2005 and 2021 was conducted. Patient demographics, treatment details, peri-operative complications, and long-term survival were reported. The primary outcome, cancer-specific survival, was investigated using time-to-event analysis and interrogated with multivariate regression.

RESULTS

There were 747 patients included in the study. There was no difference in five-year cancer-specific survival and recurrence-free survival between cohorts. Multivariate analysis for octogenarians confirmed a significant hazard signal associated with worsening cancer stage and a survival benefit associated with the administration of adjuvant therapy. However, we noted that stage-matched octogenarian patients received less adjuvant treatment compared to non-octogenarians.

CONCLUSION

Octogenarians undergoing treatment for colorectal cancer have similar cancer-specific survival and recurrence-free survival to non-octogenarians. Our study demonstrates a survival benefit when adjuvant therapy is provided to octogenarians, despite only half of this cohort receiving therapy compared to their younger peers. Further research into adjuvant therapy with surgical resection for CRC in older Australians is required.

Presentation, Molecular Characteristics, Treatment, and Outcomes of Colorectal Cancer in Patients Older than 80 Years Old

Background: An increasing proportion of the population of patients with cancer presents at an advanced age, increasing the challenges of successful and well-tolerated treatments. In the older spectrum of the geriatric cancer patients, those older than 80 years old, challenges are even higher because of increasing comorbidities and decreasing organ function reserves. Methods: Studies regarding colorectal cancer presentation, treatment, and prognosis in patients older than 80 years old available in the literature were evaluated and were compiled within a narrative review. Molecular attributes of colorectal cancer in the subset of patients older than 80 years old in published genomic cohorts were also reviewed and were compared with similar attributes in younger patients. Results: Characteristics of colorectal cancer in octogenarians are in many aspects similar to younger patients, but patients older than 80 years old present more often with right colon cancers. Surgical treatment of colorectal cancer in selected patients over 80 years old is feasible and should be pursued. Adjuvant chemotherapy is under-utilized in this population. Although combination chemotherapy is in most cases not advisable, monotherapy with fluoropyrimidine derivatives is feasible and efficacious. Conclusions: Outcomes of colorectal cancer patients over the age of 80 years old may be optimized with a combination of standard treatments adjusted to the individual patient's functional status and organ reserves. Increased support for the older age group during their colorectal cancer treatment modalities would improve oncologic outcomes with decreasing adverse outcomes of therapies.