Age-related disparities in the use of radiotherapy for treatment of localized soft tissue sarcoma

Soft Tissue Sarcomas in Octogenarian Patients: Are Treatment Options and Oncological Outcomes Different? A SEER Retrospective Study

AIMS

As the US population continues to age, oncological strategies and outcomes for soft tissue sarcomas (STSs) should continue to be examined for varying age groups. The aim of this study was analyse and compare treatment strategies and oncological outcomes for octogenarian patients with STSs.

MATERIALS AND METHODS

Data from the Surveillance, Epidemiology and End Results (SEER) national database were used. Varying treatment modalities were studied when utilised for specific tumour staging with respect to the eighth edition of the American Joint Committee on Cancer.

RESULTS

In total, 24 666 patients were included for analysis, where 3341 (14%) were 80 years old or older. The octogenarian group was diagnosed with more advanced disease (stages II-IV), relative to their younger counterparts (85% versus 75%, P < 0.001). However, a smaller proportion of the older patients underwent surgical resection (74% versus 86%, P < 0.001). Likewise, the octogenarians received less chemotherapy (4% versus 21%, P < 0.001) and radiotherapy (29% versus 42%, P = 0.010). Surgical resection and chemotherapy significantly improved overall survival for those older patients with stage II STS, whereas surgical resection and radiotherapy improved mortality in this cohort with both stage III and IV STS. Overall survival at 1 and 5 years of follow-up was lower within the octogenarian group compared with the younger group (1 year: 68% versus 88%, P < 0.001 and 5 years: 7% versus 58%, P < 0.001).

CONCLUSIONS

Octogenarian patients, in most cases, are diagnosed with stage III or metastatic disease. Surgical resection of the primary tumour was beneficial in both age cohorts, with radiotherapy correlating to better overall survival when used in those patients with higher stage STS. Chemotherapy was associated with better mortality in the younger cohort with respect to tumour stage. The octogenarian overall survival at 1 and 5 years was lower than for younger patients.

Care Disparities Across the Health Care Continuum for Older Adults: Lessons From Multidisciplinary Perspectives

Older adults comprise a considerable proportion of patients with cancer in the world. Across multiple cancer types, cancer treatment outcomes among older age groups are often inferior to those among younger adults. Cancer care for older individuals is complicated by the need to adapt treatment to baseline health, fitness, and frailty, all of which vary widely within this age group. Rates of social deprivation and socioeconomic disparities are also higher in older adults, with many living on reduced incomes, further compounding health inequality. It is important to recognize and avoid undertreatment and overtreatment of cancer in this age group; however, simply addressing this problem by mandating standard treatment of all would lead to harms resulting from treatment toxicity and futility. However, there is little high-quality evidence on which to base these decisions, because older adults are poorly represented in clinical trials. Clinicians must recognize that simple extrapolation of outcomes from younger age cohorts may not be appropriate because of variance in disease stage and biology, variation in fitness and treatment tolerance, and reduced life expectancy. Older patients may also have different life goals and priorities, with a greater focus on quality of life and less on length of life at any cost. Health care professionals struggle with treatment of older adults with cancer, with high rates of variability in practice between and within countries. This suggests that better national and international recommendations that more fully address the needs of this special patient population are required and that primary research focused on the older age group is urgently required to inform these guidelines.

Adult Pleomorphic Rhabdomyosarcomas: Assessing Outcomes Associated with Radiotherapy and Chemotherapy Use in the National Cancer Database

Purpose

Practice patterns for treatment of localized adult pleomorphic rhabdomyosarcoma (PRMS) remain quite variable given its rarity. Current national guidelines recommend management similar to that of other high-grade soft tissue sarcomas (STS), which include surgery with perioperative radiation (RT) with or without chemotherapy. Using the National Cancer Database (NCDB), we assessed practice patterns and overall outcomes of patients with localized PRMS. Patients and Methods. Patients with stage II/III PRMS treated with surgical resection from 2004 to 2015 were identified from the NCDB. Predictors of RT and chemotherapy use were assessed using multivariable logistic regression analysis. The association of radiation and chemotherapy status on overall survival was assessed using Kaplan-Meier and Cox proportional hazards analyses.

Results

Of 243 total patients, RT and chemotherapy were not uniformly utilized, with 44% receiving chemotherapy and in those who did not undergo amputation 62% receiving RT. In those who did not undergo amputation, RT was associated with improved survival on both univariate (HR: 0.49, 95% CI 0.32-0.73, P < 0.001) and multivariate analysis (HR: 0.40, 95% CI 0.26-0.62, P < 0.001), corresponding to greater 5-year overall survival (59% vs. 38%, P < 0.001). Chemotherapy was associated with a higher rate of 5-year overall survival (63% vs. 39%, P < 0.001). However, the survival benefit of chemotherapy did not reach statistical significance on multivariate analysis (HR: 0.65, 95% CI 0.41-1.03, P=0.064). Notable predictors of omission of RT included female gender (OR: 0.40, 95% CI 0.22-0.74, P < 0.01) and age ≥ 70 (OR: 0.55, 95% CI 0.30-1.00, P=0.05). Correspondingly, factors associated with omission of chemotherapy included age ≥70 (OR: 0.17, 95% CI 0.08-0.39, P < 0.001).

Conclusions

A significant proportion of patients with localized adult PRMS are not receiving RT. Likewise, use of chemotherapy was heterogeneous. Our findings note potential benefits and underutilization of RT, for which further investigation is warranted.

Radiotherapy Remains Underused in the Treatment of Soft-Tissue Sarcomas: Disparities in Practice Patterns in the United States

BACKGROUND

Practice patterns of radiation therapy (RT) use for soft-tissue sarcoma (STS) remain quite variable, despite clinical practice guidelines recommending the addition of RT to surgery for patients with high-grade STS, particularly for larger tumors. Using the National Cancer Database (NCDB), we assessed patterns of overall RT use, neoadjuvant versus adjuvant treatment, and specific RT modalities in this population.

PATIENTS AND METHODS

Patients aged ≥18 years with stage II/III STS in 2004 through 2015 were identified from the NCDB. Patterns of care were assessed using multivariable logistic regression analysis.

RESULTS

Of 27,426 total patients, 11,654 (42%) were treated with surgery alone versus 15,772 (58%) with RT in addition to surgery, with no overall increase in RT use over the study period. Notable clinical predictors of receipt of RT included tumor size (>5 cm), grade III, and tumors arising in the extremities. Conversely, female sex, older age (≥70 years), Black race, noncommercial insurance coverage, farther distance to treatment, and poor performance status were negative predictors of RT use. Of those receiving RT, 27% were treated with neoadjuvant RT and 73% with adjuvant RT. The proportion of those receiving neoadjuvant RT increased over time. Relevant factors associated with neoadjuvant RT included treatment at academic centers, larger tumor size, and extremity tumors. Of those who received RT with a modality specified as either intensity-modulated RT (IMRT) or 3D conformal RT (3DCRT), 61% were treated with IMRT and 39% with 3DCRT. The proportion of patients treated with IMRT increased over time. Relevant factors associated with IMRT use included treatment at academic centers, commercial insurance coverage, and larger and nonextremity tumors.

CONCLUSIONS

Although use of neoadjuvant RT and IMRT has increased over time, a significant number of patients with STS are not receiving adjuvant or neoadjuvant RT. Our findings also note potential sociodemographic disparities and highlight the concern that not all patients with STS are being equally considered for RT.

Defining Undertreatment and Overtreatment in Older Adults With Cancer: A Scoping Literature Review

PURPOSE

The terms undertreatment and overtreatment are often used to describe inappropriate management of older adults with cancer. We conducted a comprehensive scoping review of the literature to clarify the meanings behind the use of the terms.

METHODS

We searched PubMed (National Center for Biotechnology Information), Embase (Elsevier), and CINAHL (EBSCO) for titles and abstracts that included the terms undertreatment or overtreatment with regard to older adults with cancer. We included all types of articles, cancer types, and treatments. Definitions of undertreatment and overtreatment were extracted, and categories underlying these definitions were derived through qualitative analysis. Within a random subset of articles, C.D. and K.P.L. independently performed this analysis to determine final categories and then independently assigned these categories to assess inter-rater reliability.

RESULTS

Articles using the terms undertreatment (n = 236), overtreatment (n = 71), or both (n = 51) met criteria for inclusion in our review (n = 256). Only 14 articles (5.5%) explicitly provided formal definitions; for the remaining, we inferred the implicit definitions from the terms' surrounding context. There was substantial agreement (κ = 0.81) between C.D. and K.P.L. in independently assigning categories of definitions within a random subset of 50 articles. Undertreatment most commonly implied less than recommended therapy (148; 62.7%) or less than recommended therapy associated with worse outcomes (88; 37.3%). Overtreatment most commonly implied intensive treatment of an older adult in whom the harms of treatment outweigh the benefits (38; 53.5%) or intensive treatment of a cancer not expected to affect an older adult in his/her remaining lifetime (33; 46.5%).

CONCLUSION

Undertreatment and overtreatment of older adults with cancer are imprecisely defined concepts. We propose new, more rigorous definitions that account for both oncologic factors and geriatric domains.

Size dependent anti-invasiveness of silver nanoparticles in lung cancer cells

The molecular mechanism of cancer cell death caused by silver nanoparticles (AgNPs) of different sizes is investigated. Compared with the larger nanoparticles, 13 nm AgNPs significantly inhibit the migration and invasiveness of lung adenocarcinoma A549 cells, induce elevated reactive oxygen species and lead to NF-κB directed cellular apoptosis.

Size-dependent anti-invasiveness effect of AgNPs was determined using A549 lung adenocarcinoma cells. The 13 nm AgNPs can significantly inhibit the migration and invasion of A549 cells and induce the elevated level of ROS and NF-κB directed cell apoptosis.

Adherence to National Comprehensive Cancer Network Guidelines is Associated with Improved Survival for Patients with Stage 2A and Stages 2B and 3 Extremity and Superficial Trunk Soft Tissue Sarcoma

BACKGROUND

The National Comprehensive Cancer Network (NCCN) has instituted treatment guidelines for stage 2A and stages 2B and 3 extremity and superficial trunk soft tissue sarcomas (ETSTS). This study examined adherence to the NCCN guidelines and factors associated with nonadherent treatment and survival outcomes.

METHODS

Patients with stage 2A and stages 2B and 3 ETSTS (n = 15,957) were categorized as undergoing adherent or nonadherent treatment based on the 2014 NCCN guidelines. Multivariate logistic regression models were used to determine factors associated with nonadherent treatment. Overall survival (OS) and disease-specific survival (DSS) were calculated, and Cox models were used to generate adjusted survival curves and hazard ratios (HRs).

RESULTS

The findings showed that 87.2% of the patients with stage 2A disease and 58.3% of the patients with stage 2B or 3 disease received adherent treatment. Community treatment facilities and uninsured or unknown insurance status were associated with nonadherent treatment for both stage groups. Adherent treatment was associated with higher 5-year adjusted OS and DSS for stage 2A and stage 2B or 3 patients. In Cox models, nonadherent treatment was associated with worse survival for both stage 2A disease (HR, 2.31; 95% confidence interval [CI], 2.02-2.63) and stages 2B and 3 disease (HR, 1.63; 95% CI, 1.53-1.73). Increasing age and non-private insurance were associated with poorer outcomes. For stages 2B and 3 disease, treatment at a community center and African American race were associated with worse survival.

CONCLUSIONS

Adherence to NCCN guidelines is excellent for stage 2A and poor for stages 2B and 3 ETSTS. Adherent treatment was associated with improved survival outcomes, highlighting the importance of adherence to NCCN guidelines.

Worse Survival in Elderly Patients with Extremity Soft-Tissue Sarcoma

BACKGROUND

Nearly half of soft-tissue sarcoma (STS) patients are over the age of 65, and the behavior of cancer in these elderly patients is poorly understood. The aim of this study was to assess the impact of age, sarcoma histotype, grade, stage, and treatment modalities on survival of extremity STS (ESTS) patients.

METHODS

Patients ≥18 years diagnosed with ESTS between 1989 and 2008 were selected from the Netherlands Cancer Registry. Survival rates and patient and treatment characteristics were analyzed for all patients. Relative survival and relative excess risk of death were estimated for young (<65 years) and older (>65 years) patients.

RESULTS

Overall, 3066 patients were included in this study. Histotype was different between young (<65 years) and elderly (>65 years) patients (p < 0.001). Patients over the age of 65 were more often diagnosed with high-stage ESTS and an increasing proportion of high-grade ESTS (p < 0.001). The proportion of patients who received no treatment increased with age, and the elderly received fewer combined-modality treatments. Age was significantly associated with relative 5-year survival [72.7 % for younger patients and 43.8 % for the oldest elderly (>85 years)]. In multivariable analysis, age still remained a significant prognostic factor.

CONCLUSIONS

Different distribution of sarcoma histotypes, more high-stage and high-grade sarcomas at diagnosis, less aggressive treatment, and worse survival rates emphasize the need for optimizing sarcoma research and care of the elderly.

Improvement in Overall Survival from Extremity Soft Tissue Sarcoma over Twenty Years

Several patient demographic factors, including marital status, have been demonstrated to have prognostic significance for survival in extremity soft tissue sarcoma (ESTS). A study population of 12,546 adult patients diagnosed with ESTS from 1991 to 2010 was identified from the SEER database, a large population-based registry, in order to determine whether overall survival had changed over this recent 20-year period. The study population was divided into three groups by year of diagnosis: 1991–1996, 1997–2003, and 2004–2010. We used the Kaplan-Meier method and Cox proportional hazards regression to assess survival differences between different demographic groups and prognostic clinical characteristics. Over the course of time, the 5-year overall survival rates have increased from 28% in the earliest time period to 62% in the latest (P < 0.0001). On multivariate analysis, the mortality rate progressively declined from the 1991–1996 group (HR: 3.02, CI: 2.78–3.29) to the 1997–2003 group (HR: 2.21, CI: 2.06–2.37), with the 2004–2010 group having the best overall survival, despite increases in the proportion of patients with tumors greater than 5 cm in size (P < 0.0001), and those presenting with metastasis (P < 0.0001).

Socio-economic factors affect the outcome of soft tissue sarcoma: an analysis of SEER data

BACKGROUND

This study analyzed whether socio-economic factors affect the cause specific survival of soft tissue sarcoma (STS).

METHODS

Surveillance, Epidemiology and End Results (SEER) soft tissue sarcoma (STS) data were used to identify potential socio-economic disparities in outcome. Time to cause specific death was computed with Kaplan-Meier analysis. Kolmogorov-Smirnov tests and Cox proportional hazard analysis were used for univariate and multivariate tests, respectively. The areas under the receiver operating curve were computed for predictors for comparison.

RESULTS

There were 42,016 patients diagnosed STS from 1973 to 2009. The mean follow up time (S.D.) was 66.6 (81.3) months. Stage, site, grade were significant predictors by univariate tests. Race and rural-urban residence were also important predictors of outcome. These five factors were all statistically significant with Cox analysis. Rural and African-American patients had a 3-4% disadvantage in cause specific survival.

CONCLUSIONS

Socio-economic factors influence cause specific survival of soft tissue sarcoma. Ensuring access to cancer care may eliminate the outcome disparities.

Inequalities in lung cancer care of elderly patients with schizophrenia: an observational cohort study

OBJECTIVE

Cancer mortality is higher in individuals with schizophrenia, a finding that may be due, in part, to inequalities in care. We evaluated gaps in lung cancer diagnosis, treatment, and survival among elderly individuals with schizophrenia.

METHODS

The Surveillance, Epidemiology, and End Results database linked to Medicare records was used to identify patients 66 years or older with primary non-small cell lung cancer. Lung cancer stage, diagnostic evaluation, and rates of stage-appropriate treatment were compared among patients with and without schizophrenia using unadjusted and multiple regression analyses. Survival was compared among groups using Kaplan-Meier methods.

RESULTS

Of the 96,702 patients with non-small cell lung cancer in the Surveillance, Epidemiology, and End Results database, 1303 (1.3%) had schizophrenia. In comparison with the general population, patients with schizophrenia were less likely to present with late-stage disease after controlling for age, sex, marital status, race/ethnicity, income, histology, and comorbidities (odds ratio = 0.82, 95% confidence interval = 0.73-0.93) and were less likely to undergo appropriate evaluation (p < .050 for all comparisons). Adjusting for similar factors, patients with schizophrenia were also less likely to receive stage-appropriate treatment (odds ratio = 0.50, 95% confidence interval = 0.43-0.58). Survival was decreased among patients with schizophrenia (mean survival = 22.3 versus 26.3 months, p = .002); however, no differences were observed after controlling for treatment received (p = .40).

CONCLUSIONS

Elderly patients with schizophrenia present with earlier stages of lung cancer but are less likely to undergo diagnostic evaluation or to receive stage-appropriate treatment, resulting in poorer outcomes. Efforts to increase treatment rates for elderly patients with schizophrenia may lead to improved survival in this group.

Compliance with National Comprehensive Cancer Network guidelines in the use of radiation therapy for extremity and superficial trunk soft tissue sarcoma in the United States

BACKGROUND

We sought to examine adherence to National Comprehensive Cancer Network guidelines for use of radiation therapy (RT) in patients with soft tissue sarcoma (STS) in the United States.

METHODS

The surveillance, epidemiology, and end results cancer registry was queried to identify patients undergoing surgery for truncal and extremity STS from 2004 to 2009.

RESULTS

Of 5,075 patients, 50% received RT. Although routine RT is not recommended for Stage I patients, 25% still underwent RT. Even though routine RT is recommended for Stage II and III tumors, only 60% underwent RT. On multivariate analysis predictors of RT included age <50 years (OR 1.57, 95% CI 1.28-1.91), malignant fibrous histiocytoma histology (OR 1.47, 95% CI 1.3-1.92), T2 classification (OR 1.88, 95% CI 1.60-2.20), and G3 (OR 6.27, 95% CI 5.10-7.72). Patients with Stage III STS who received RT showed improved disease specific survival at 5 years compared to those who did not, 68% versus 46%, P <0.001.

CONCLUSIONS

Underuse of RT is seen for a significant proportion of patients undergoing treatment for STS in the United States. More effort needs to be directed towards compliance with appropriate treatment recommendations, perhaps by regionalizing sarcoma care or remote multidisciplinary tumor boards.

Age-related disparities in use of completion lymphadenectomy for melanoma sentinel lymph node metastasis

BACKGROUND

Guidelines recommend that patients with melanoma metastatic to the sentinel lymph node (SLN) undergo a completion lymphadenectomy (CLND) of the affected lymph node basin. We have previously reported on decreased use of SLN biopsy among elderly patients. We hypothesized that elderly patients with SLN metastases would have lower rates of CLND relative to their younger counterparts.

METHODS

The Surveillance, Epidemiology, and End Results database was queried for patients who underwent SLN biopsy for intermediate thickness cutaneous melanoma (Breslow thickness 1.01 mm-4.00 mm) from 2004 to 2008 and were found to have SLN metastasis. Patients were categorized according to age by decade. We then used multivariate logistic regression models to predict receipt of CLND. Additional covariates included sex, race/ethnicity, T stage, tumor histology, tumor location, and ulceration. The likelihood of receiving a CLND was reported as OR with 95% CI; significance was set at P ≤ 0.05.

RESULTS

Entry criteria were met by 765 patients. Of these, 548 (71.6%) patients underwent CLND. On multivariate analysis, patients in the age groups 70-79 y old (OR 0.39, CI 0.20-0.78; P = 0.007) and ≥ 80 y old (OR 0.27, CI 0.12-0.61; P = 0.001) were less likely to undergo CLND than the youngest age group (1-39 y old).

CONCLUSIONS

Elderly patients with SLN metastasis are less likely to receive CLND than their younger counterparts. A multi-center randomized clinical trial evaluating the potential survival benefit of CLND is ongoing. Further research to assess reasons why the elderly are less likely to receive CLND are needed.

Assessing rural-urban disparities in the use of sentinel lymph node biopsy for melanoma

BACKGROUND

We hypothesized that patients in urban areas with intermediate thickness cutaneous melanoma would have higher rates of sentinel lymph node biopsy (SLNB) relative to their rural-dwelling counterparts.

METHODS

The Surveillance, Epidemiology, and End Results database was queried for patients who underwent surgery for intermediate thickness cutaneous melanoma from 2004-2008. Patients were categorized as coming from urban or rural counties based on a nine-point scale. We used multivariate logistic regression models to predict use of SLNB. Covariates examined included sex, race/ethnicity, age, T stage, tumor histology, tumor location, and ulceration. The likelihood of undergoing SLNB was reported as OR with 95% CI.

RESULTS

Of 8441 patients, 8382 (99.3%) had complete information regarding use of SLNB. On multivariate analysis, patients from rural counties had a decreased likelihood of receiving a SLNB (OR 0.87, CI 0.78-0.97; P = 0.014). Additional factors associated with a decreased likelihood of receiving a SLNB included increasing age, Asian/Hispanic/Unknown race, and head and neck or overlapping primary tumor site.

CONCLUSIONS

Patients in rural areas are less likely to receive a SLNB for intermediate thickness cutaneous melanoma than their urban-dwelling counterparts.

Geographic variation in utilization of sentinel lymph node biopsy for intermediate thickness cutaneous melanoma

BACKGROUND AND OBJECTIVES

Sentinel lymph node biopsy (SLNB) is the standard for evaluation of the draining lymphatic basin for intermediate thickness melanoma. Despite this, SLNB has not been uniformly adopted. We hypothesized that there are geographic areas of the United States where patients are less likely to receive SLNB.

METHODS

The Surveillance, Epidemiology, and End Results database was queried for patients who underwent surgery for intermediate thickness cutaneous melanoma (Breslow thickness 1.00-4.00 mm) from 2004 to 2008. Patients were categorized according to geographic area based on the reporting registry. Multivariate logistic regression models predicted use of SLNB.

RESULTS

Entry criteria were met by 8957 patients. On multivariate analysis, patients from the South were less likely (OR 0.54, CI 0.48-0.62; P < 0.001) to receive a SLNB. Additional factors associated with a decreased likelihood of receiving a SLNB included head and neck primary tumor site, high or unknown serum LDH, Asian, Hispanic, Native American or unknown race, and increasing age.

CONCLUSIONS

Patients from the South were less likely to receive a SLNB for an intermediate thickness cutaneous melanoma. This report of geographic disparities on a national level should be confirmed locally to better guide interventions aimed at eliminating these disparities.

Comparison of outcomes and the use of multimodality therapy in young and elderly people undergoing surgical resection of pancreatic cancer

OBJECTIVES

To compare outcomes and the use of multimodality therapy in young and elderly people with pancreatic cancer undergoing surgical resection.

DESIGN

Retrospective, single-institution study.

SETTING

National Cancer Institute/National Comprehensive Cancer Network cancer center.

PARTICIPANTS

Two hundred three individuals who underwent pancreaticoduodenectomy for pancreatic adenocarcinoma at Duke University Medical Center comprised the study population. Participants were divided into three groups based on age (<65, n = 97; 65-74, n = 74; ≥75, N = 32).

MEASUREMENTS

Perioperative outcomes, the use of multimodality therapy, and overall survival of the different age groups were compared.

RESULTS

Similar rates of perioperative mortality and morbidity were observed in all age groups, but elderly adults were more likely to be discharged to a rehabilitation or skilled nursing facility. A similar proportion of participants received neoadjuvant therapy, but a smaller proportion of elderly participants received adjuvant therapy. Overall survival was similar between the age groups. Predictors of poorer overall survival included coronary artery disease, positive resection margin, and less-differentiated tumor histology. Treatment with neoadjuvant and adjuvant therapy were predictors of better overall survival.

CONCLUSION

Carefully selected elderly individuals experience similar perioperative outcomes and overall survival to those of younger individuals after resection of pancreatic cancer. There appears to be a significant disparity in the use of adjuvant therapy between young and elderly individuals.