PMCC PMCC

Search tips
Search criteria

Advanced
Results 1-7 (7)
 

Clipboard (0)
None

Select a Filter Below

Journals
Year of Publication
Document Types
1.  SECONDARY GASTROINTESTINAL MALIGNANCIES IN CHILDHOOD CANCER SURVIVORS: A COHORT STUDY 
Annals of internal medicine  2012;156(11):757-260.
Background
Childhood cancer survivors develop gastrointestinal malignancies more frequently and at a younger age than the general population, but risk factors for their development have not been well characterized.
Objective
To determine the risk and associated risk factors for gastrointestinal subsequent malignant neoplasms (SMN) in childhood cancer survivors.
Design
Retrospective cohort study.
Setting
The Childhood Cancer Survivor Study, a multi-center study of childhood cancer survivors diagnosed between 1970 and 1986.
Patients
14,358 survivors of a malignancy diagnosed at < 21 years who had survived for 5 or more years from initial diagnosis.
Measurements
Standardized incidence ratios (SIR) for gastrointestinal SMN were calculated using age-specific population data. Multivariate Cox regression models identified associations between risk factors and gastrointestinal SMN development.
Results
At median follow-up of 22.8 years (range: 5.5-30.2), 45 gastrointestinal malignancies were identified. Gastrointestinal SMN risk was 4.6-fold higher in childhood cancer survivors than the general population (95% confidence interval [CI]: 3.5-6.1). Colorectal cancer SIR was 4.2 (95% CI: 2.8-6.3). The highest gastrointestinal SMN risk was associated with abdominal radiation (SIR=11.2, 95% CI: 7.6-16.4). However, survivors not exposed to radiation had a significantly increased risk (SIR=2.4, 95% CI-1.4-3.9). In addition to abdominal radiation, high dose procarbazine (RR=3.2, 95% CI 1.1-9.4) and platinum drugs (RR 7.6, 95% CI: 2.3-25.5) independently increased the gastrointestinal SMN risk.
Limitations
This cohort has not yet attained an age at which gastrointestinal malignancy risk is greatest.
Conclusions
Childhood cancer survivors, particularly those exposed to abdominal radiation, are at increased risk for gastrointestinal SMN. These findings suggest that surveillance of at-risk childhood cancer survivors should commence at a younger age than recommended for the general population.
doi:10.1059/0003-4819-156-11-201206050-00002
PMCID: PMC3554254  PMID: 22665813
2.  Racial and Ethnic Disparities in Risk and Survival in Children With Neuroblastoma: A Children's Oncology Group Study 
Journal of Clinical Oncology  2010;29(1):76-82.
Purpose
Although health disparities are well-described for many cancers, little is known about racial and ethnic disparities in neuroblastoma. To evaluate differences in disease presentation and survival by race and ethnicity, data from the Children's Oncology Group (COG) were analyzed.
Patients and Methods
The racial/ethnic differences in clinical and biologic risk factors, and outcome of patients with neuroblastoma enrolled on COG ANBL00B1 between 2001 and 2009 were investigated.
Results
A total of 3,539 patients (white, 72%; black, 12%; Hispanic, 12%; Asian, 4%; and Native American, < 1%) with neuroblastoma were included. The 5-year event-free survival (EFS) rates were 67% for whites (95% CI, 65% to 69%), 69% for Hispanics (95% CI, 63% to 74%), 62% for Asians (95% CI, 51% to 71%), 56% for blacks (95% CI, 50% to 62%), and 37% for Native American (95% CI, 17% to 58%). Blacks (P < .001) and Native Americans (P = .04) had a higher prevalence of high-risk disease than whites, and significantly worse EFS (P = .01 and P = .002, respectively). Adjustment for risk group abrogated these differences. However, closer examination of the EFS among high-risk patients who remained event free for 2 years or longer, revealed a higher prevalence of late-occurring events among blacks compared with whites (hazard ratio, 1.5; 95% CI, 1.0 to 2.3; P = .04).
Conclusion
Black and Native American patients with neuroblastoma have a higher prevalence of high-risk disease, accounting for their worse EFS when compared with whites. The higher prevalence of late-occurring events among blacks with high-risk disease suggests that this population may be more resistant to chemotherapy. Studies focused on delineating the genetic basis for the racial disparities observed in this study are planned.
doi:10.1200/JCO.2010.29.6103
PMCID: PMC3055862  PMID: 21098321
3.  Inconsistent mammography perceptions and practices among women at risk of breast cancer following a pediatric malignancy: a report from the Childhood Cancer Survivor Study 
Cancer causes & control : CCC  2010;21(10):1585-1595.
Women treated with chest radiation for a pediatric cancer have low mammography screening rates despite their high risk for breast cancer. This study characterized the relationship between perceptions of mammography and screening practices. A cross-sectional survey was administered to 523 women in North America who were treated with chest radiation before 21 years of age. Women with inconsistent mammography perceptions and practices were identified using the Pros and Cons of Mammography for perceptions and Transtheoretical Model stages of adoption for prior and intended screening practices. Classification and regression tree (CART) analysis was used to identify barriers to and facilitators of screening among women with positive and negative perceptions. Nearly one-third of the cohort had inconsistent perceptions and practices: 37.4% had positive perceptions and were not having mammograms; 27.6% had negative/neutral perceptions and were having mammograms. Regardless of perceptions, a recent physician’s recommendation for mammography, age ≥ 40, and interest in routine health care were universally associated with mammography practices. For women with positive perceptions and a physician’s recommendation, barriers to screening included high acceptance coping, low active-planning coping, and high internal health locus of control. For women with negative perceptions, acknowledging the importance of asymptomatic screening was associated with mammography.
doi:10.1007/s10552-010-9587-5
PMCID: PMC2941535  PMID: 20506037
Cancer survivorship; Late effects; Screening; Transtheoretical model; Stages of adoption
4.  Physician Preferences and Knowledge Gaps Regarding the Care of Childhood Cancer Survivors: A Mailed Survey of Pediatric Oncologists 
Journal of Clinical Oncology  2009;28(5):878-883.
Purpose
Little is known about physicians' attitudes and knowledge regarding the health care needs of childhood cancer survivors (CCS). We sought to obtain pediatric cancer physicians' self-reported attitudes and knowledge regarding this population.
Methods
A mailed survey was sent to 1,159 pediatric oncologists in the United States.
Results
A total of 655 surveys were returned (ie, 57% response rate). Median age of respondents was 47 years (range, 31 to 82 years); 57% were men. Respondents practiced for a median 14 years (range, 1 to 50 years) and reported seeing a median of 21 patients per week (range, 0 to 250 patients per week). When comfort levels in caring for CCS were described (ie, 1 = very uncomfortable; 7 = very comfortable), respondents were most comfortable with survivors ≤ 21 years (mean ± standard deviation, 6.2 ± 1.3 level), were less comfortable (5.0 ± 1.5 level) with those older than 21 years but less than 30 years old, and were uncomfortable with CCS ≥ 30 years (2.9 ± 1.7 level). In response to a clinical vignette of a 29-year-old woman treated with mantle radiation for Hodgkin's lymphoma at 16 years of age, and on the basis of available guidelines, 34% of respondents did not appropriately recommend yearly breast cancer surveillance; 43% of respondents did not appropriately recommend cardiac surveillance; and 24% of respondents did not appropriately recommend yearly thyroid surveillance. Those with greater self-reported familiarity with available long-term follow-up (LTFU) guidelines (odds ratio [OR], 1.33; 95% CI, 1.15 to 1.54) and with receipt of training in the care of CCS (OR, 1.73; 95% CI, 1.18 to 2.52) were more likely to have answered all three questions correctly.
Conclusion
Pediatric oncologists express a range of preferences with regard to LTFU of CCS. Many appear unfamiliar with LTFU surveillance guidelines.
doi:10.1200/JCO.2009.25.6107
PMCID: PMC3040043  PMID: 20038717
5.  Health Behaviors, Medical Care, and Interventions to Promote Healthy Living in the Childhood Cancer Survivor Study Cohort 
Journal of Clinical Oncology  2009;27(14):2363-2373.
Childhood cancer survivors are at risk for medical and psychosocial late effects as a result of their cancer and its therapy. Promotion of healthy lifestyle behaviors and provision of regular risk-based medical care and surveillance may modify the evolution of these late effects. This manuscript summarizes publications from the Childhood Cancer Survivor Study (CCSS) that have examined health behaviors, risk-based health care, and interventions to promote healthy lifestyle practices. Long-term survivors use tobacco and alcohol and have inactive lifestyles at higher rates than is ideal given their increased risk of cardiac, pulmonary, and metabolic late effects. Nearly 90% of survivors report receiving some form of medical care. However, only 18% report medical visits related to their prior cancer that include discussion or ordering of screening tests or counseling on how to reduce the specific risks arising from their cancer. One low-cost, peer-driven intervention trial has been successful in improving smoking cessation within the CCSS cohort. On the basis of data from CCSS investigations, several trials to promote improved medical surveillance among high-risk groups within the cohort are underway. Despite their long-term risks, many survivors of childhood cancer engage in risky health behaviors and do not receive adequate risk-based medical care.
doi:10.1200/JCO.2008.21.1441
PMCID: PMC2738646  PMID: 19255308
6.  Surveillance for Breast Cancer in Women Treated with Chest Radiation for a Childhood, Adolescent or Young Adult Cancer: A Report from the Children's Oncology Group 
Annals of internal medicine  2010;152(7):444-W154.
Background
Women treated with therapeutic chest radiation may develop breast cancer.
Purpose
Summarize breast cancer risk and breast cancer surveillance in women following chest radiation for a pediatric or young adult cancer.
Data Sources
Studies from MEDLINE, EMBASE, Cochrane Library, and CINAHL (1966 through December 2008).
Study Selection
Articles selected to answer any of 3 questions: 1) What is the incidence and excess risk of breast cancer in women following chest radiation for a pediatric or young adult cancer? 2) For these women, are the clinical characteristics of the breast cancer and the outcomes following therapy different than for women with sporadic breast cancer in the general population? 3) What are the potential benefits and harms associated with breast cancer surveillance among women exposed to chest radiation?
Data Extraction
Three investigators independently extracted data and assessed study quality.
Data Synthesis
Standardized incidence ratios ranged from 13.3 to 55.5; cumulative incidence of breast cancer by 40–45 years of age ranged from 13–20%. Risk of breast cancer increased linearly with chest radiation dose. Available limited evidence suggests that the characteristics of the breast cancers in these women and the outcomes following diagnosis are similar to those in the general population; these breast cancers can be detected by mammography, though sensitivity is limited.
Limitations
Limitations include study heterogeneity, design and small sample size.
Conclusions
Women treated with chest radiation have a substantially elevated risk of breast cancer at a young age, which does not appear to plateau. Among this high risk population, there appears to be a benefit associated with early detection. Further research is required to better define the harms and benefits of lifelong surveillance.
doi:10.1059/0003-4819-152-7-201004060-00009
PMCID: PMC2857928  PMID: 20368650
7.  Breast Cancer Surveillance Practices Among Women Previously Treated With Chest Radiation for a Childhood Cancer 
Context
Women treated with chest radiation for a pediatric malignancy have a significantly increased risk of breast cancer at a young age and are recommended to have an annual screening mammogram starting at age 25 or 8 years after radiation, whichever occurs last.
Objective
Characterize the breast cancer surveillance practices among female pediatric cancer survivors who were treated with chest radiation and identify correlates of screening.
Design, Setting, Participants
Between June 2005 and August 2006, a 114-item questionnaire was administered to a random sample of 625 female pediatric cancer survivors who had been treated with chest radiation and were age 25–50 and participating in the Childhood Cancer Survivor Study (CCSS), a North American cohort of long-term survivors diagnosed from 1970–1986. Comparisons were made with similarly aged pediatric cancer survivors not treated with chest radiation (N=639) and the CCSS siblings cohort (N=712).
Main Outcome Measure
Screening mammogram within the previous two years.
Results
Of 1976 cancer survivors and siblings who were contacted, 87.9% participated. Among the 551 women with a history of chest radiation, 55% reported a screening mammogram in the past two years (ages 25–39, 36.5%; 95% confidence interval [CI], 31.0%–42.0%; ages 40–50, 76.5%; 95% CI, 71.3%–81.7%). In comparison, 40.5% of survivors without chest radiation and 37.0% of CCSS siblings reported a screening mammogram in the same time interval. Notably, among women with a history of chest radiation, 47.3% (95% CI, 41.6%–53.0%) of those under age 40 had never had a mammogram and only 52.6% (95% CI, 46.4%–58.8%) of women ages 40–50 were being regularly screened (two mammograms within four years). Screening rates were higher among women who reported a physician recommendation compared to those who did not (ages 25–39, 76.0% vs. 17.6%; ages 40–50, 87.3% vs. 58.3%). In multivariable models, the association was particularly strong for younger women (ages 25–39, prevalence ratio [PR] = 3.0, 95% CI, 2.0–4.0; ages 40–50, PR = 1.3, 95% CI, 1.1–1.6).
Conclusions
In this study cohort of women who had childhood cancer treated with chest radiation, 63.5% of those aged 25–39 years and 23.5% of those aged 40–50 years had not undergone mammography screening for breast cancer, as recommended by current guidelines for survivors of childhood cancer.
doi:10.1001/jama.2008.1039
PMCID: PMC2676434  PMID: 19176442

Results 1-7 (7)