Management and long-term complications of pediatric cancer

A comprehensive overview of liquid biopsy applications in pediatric solid tumors

Liquid biopsies are emerging as an alternative source for pediatric cancer biomarkers with potential applications during all stages of patient care, from diagnosis to long-term follow-up. While developments within this field are reported, these mainly focus on dedicated items such as a specific liquid biopsy matrix, analyte, and/or single tumor type. To the best of our knowledge, a comprehensive overview is lacking. Here, we review the current state of liquid biopsy research for the most common non-central nervous system pediatric solid tumors. These include neuroblastoma, renal tumors, germ cell tumors, osteosarcoma, Ewing sarcoma, rhabdomyosarcoma and other soft tissue sarcomas, and liver tumors. Within this selection, we discuss the most important or recent studies involving liquid biopsy-based biomarkers, anticipated clinical applications, and the current challenges for success. Furthermore, we provide an overview of liquid biopsy-based biomarker publication output for each tumor type based on a comprehensive literature search between 1989 and 2023. Per study identified, we list the relevant liquid biopsy-based biomarkers, matrices (e.g., peripheral blood, bone marrow, or cerebrospinal fluid), analytes (e.g., circulating cell-free and tumor DNA, microRNAs, and circulating tumor cells), methods (e.g., digital droplet PCR and next-generation sequencing), the involved pediatric patient cohort, and proposed applications. As such, we identified 344 unique publications. Taken together, while the liquid biopsy field in pediatric oncology is still behind adult oncology, potentially relevant publications have increased over the last decade. Importantly, steps towards clinical implementation are rapidly gaining ground, notably through validation of liquid biopsy-based biomarkers in pediatric clinical trials.

Childhood Cancer Survivors' Adherence to Healthcare Recommendations Made Through a Distance-Delivered Survivorship Program

Purpose

Ongoing survivorship care allows childhood cancer survivors the opportunity to address treatment-related health problems and improve their quality of life. However, many survivors do not adhere to their healthcare professionals’ recommendations and the factors supporting their adherence remain unclear.

Patients and Methods

Long-term childhood cancer survivors completed the “Re-engage” program, which assessed survivors’ heath needs and provided individualised recommendations for health interventions and surveillance developed by an expert multi-disciplinary team (MDT). We measured survivors’ recall of, and adherence to, their individualised healthcare recommendations at one and six months post-intervention. We conducted a series of univariate negative binomial regressions to investigate factors associated with the total number of recommendations that were correctly recalled and adhered to.

Results

We analysed the data of 25 childhood cancer survivors who participated in Re-engage (mean age = 31.9 years). On average, survivors were provided with 6.6 recommendations (range = 1–11). Survivors accurately recalled receiving 3.0 recommendations at one month post-intervention and 1.9 at six months. Survivors had adhered to an average of 1.3 recommendations by six-month follow-up. In total, 56% of participants reported that they did not adhere to any recommendations. By six-month follow-up, greater adherence to MDT recommendations was associated with having a history of a second cancer (B = 1.391; 95% confidence interval [CI], 0.686 to 2.097; p < 0.001) and reporting a greater level of worry about late effects (B = 1.381; 95% CI, 0.494 to 2.269; p = 0.002).

Conclusion

Survivors reported sub-optimal levels of adherence and demonstrated limited recall of their healthcare recommendations. Effective communication of recommendations and clear discussion of barriers limiting adherence, coupled with late effects education, may be critical to ensure that survivors engage with their recommendations, to improve their quality of life and health outcomes.

Trial Registration Number

ACTRN12618000194268.

Physical Impairment and Social Life, Goals among Adult Long-term Survivors of Childhood Cancer: A Population-based Study from the Childhood Cancer Registry of Piedmont, Italy

Aims and Background

The study describes the health status and the attainment of life goals in the adult survivors of childhood cancer recorded at the Childhood Cancer Registry of Piedmont.

Methods and Study Design

A postal questionnaire was sent to the general practitioner of the 690 cases born before 1976 and alive in 1991 after at least 5 years from diagnosis. The answer was received for 485 (72.9%) included in the analyses. Items in the questionnaire were: sequelae related to cancer and its treatment, health-related quality of life (according to Bloom's criteria), educational level attained, and employment status.

Results

Vital and marital status were obtained for all 690 cases at the offices of the town of residence. No medical condition was reported for 309 cases (63.7%). The overall proportion with a high school or university education was compared to corresponding figures for Piedmont in 1991, adjusted by age, and was as high as in the general population. Similar results are observed for occupation. Patients of both genders were married less than expected. Patients with leukemia (112 cases), non-Hodgkin's lymphoma (34) or Hodgkin's lymphoma (52) were reported to have the highest quality of life. In contrast, patients with tumors of the central nervous system (151) had the highest frequency of sequelae and the lowest score for health-related quality of life. They also presented the lowest educational achievement, the lowest proportion of employment and, among males, the lowest frequency of marriage.

Conclusions

Our study shows a good social adjustment of adult survivors from childhood cancer, with the exception of central nervous system tumors. From the methodologic point of view, the present study shows the feasibility of surveillance surveys on health-related quality of life with the contribution of general practitioners.

Health information needs of childhood cancer survivors and their family

BACKGROUND

Knowledge about past disease, treatment, and possible late effects has previously been shown to be low in survivors of childhood cancer and their relatives. This study investigated the information needs of childhood cancer survivors and their parents and explored possible determinants for differences in information need and health-related Internet use.

PROCEDURE

Childhood cancer survivors or their parents were contacted to complete a questionnaire about their characteristics, Internet use and requirements/expectations of a website on late effects (N = 160).

RESULTS

One-hundred forty-five questionnaires (90.6%) were returned. Of the 69 respondents (49.3%) who had visited a late effects outpatient clinic prior to the survey, 20 (29.0%) had questions left after the consult. The large majority of the population had home access to Internet and 71 respondents (49.3%) used Internet for medical questions. Only 15 respondents (10.5%) used Internet to look for information on late effects of childhood cancer and only 4 survivors found what they were looking for. Main information items requested were information about recognizing late effects, personalized information on late effects treatment and information on self-care. Only six respondents (4.2%) stated they would not visit a late effects website if it would be available.

CONCLUSIONS

The need for late effects information showed to be of high priority by the majority of respondents, as was their interest in visiting a late effects website. In the development of a late effects website, attention should be given to patient information tailored to the personal situation of the website's users.

Adult survivors of childhood cancer and their parents: experiences with survivorship and long-term follow-up

To compare the perspectives of adult childhood cancer survivors and their parents in terms of: (1) parental involvement in the survivor's healthcare, (2) thoughts and discussion about their own or their son's/daughter's childhood cancer, (3) concern about the survivor's current health status, and (4) perceived benefits of follow-up care. Forty-two adult survivors and their parents completed a semistructured audio-taped interview via the phone responding to a parallel set of questions. Thirty-eight percent of survivors reported that one of their parents attended the adult survivor clinic with them; in 41% of patient-parent dyads the parent expressed more concern than their child about the child's health status; 45% of the parents reported thinking about the cancer experience more often than their child. The results suggest that some parents continue to worry about their child's health status into adulthood, and in turn may choose to stay involved in their adult child's healthcare. Additional research is needed to understand the survivorship needs of the adult survivor and their family. Including parents in important healthcare decisions and discussions may be a consideration when caring for this unique population of patients.

Transitioning to survivorship: a pilot study

There are no clear transition guidelines for adolescent and young adult cancer patients, their parents, and their primary care providers (PCPs) when completing active therapy and within the first few years after therapy. The purpose of this pilot study was to identify needs and concerns of recently treated adolescent cancer patients and their parents, young adult cancer survivors, and the community PCPs of adolescent patients. Four focus group interviews were conducted with survivors and parents, and 3 in-depth interviews were conducted with PCPs. All interviews were audiotaped and transcribed for content analysis. A range of needs were identified, including lack of adequate written and verbal information about their prior treatment, its potential side effects, and appropriate follow-up care. The best sources for education were identified as the primary oncologist, nurse practitioner, or nurse. At completion of treatment, parents and adult survivors felt a lack of psychosocial support. Suggestions from participants included use of informational videos for survivors, weekend education and support programs, ongoing support groups, use of the Internet, and educational newsletters. The PCPs reported a lack of general pediatric oncology knowledge and specific patient information, time constraints in their patient schedules, and having few survivors in their practices as barriers to optimal survivorship care. Further research is needed to look at the unmet educational and psychological needs of childhood cancer survivors and their parents during the critical time when they transition off treatment.

Improving health care for adult survivors of childhood cancer: recommendations from a delphi panel of health policy experts

OBJECTIVES

To identify barriers to, models of care for, and initiatives to improve health care of adult survivors of childhood cancer.

METHODS

Seventeen health care policy experts were asked to respond to the three objectives through a three-iterative Delphi process.

RESULTS

Key barriers identified were that primary care physicians are unfamiliar with the health problems of survivors and survivors are often unaware of their risks. The recommended model of care would incorporate the chronic disease management model. Highest priority initiatives recommended were targeted education of primary care physicians and survivors, development and evaluation of standards of survivorship care, and a national web-based information center.

CONCLUSIONS

The insights and recommendations of the panel provide a foundation intended to improve health care of cancer survivors.

Education, employment, insurance, and marital status among 694 survivors of pediatric lower extremity bone tumors: a report from the childhood cancer survivor study

BACKGROUND

With increasing numbers of childhood cancer survivors, direct sequelae of cancer therapy and psychosocial outcomes are becoming more important. The authors described psychosocial outcomes (education, employment, health insurance, and marriage) for survivors of pediatric lower extremity bone tumors.

METHODS

The long-term follow-up study of the Childhood Cancer Survivor Study is a multiinstitutional cohort study comprising 14,054 individuals who have survived for 5 or more years after treatment for cancer diagnosed during childhood or adolescence. Baseline demographic and medical information were obtained. Six hundred ninety-four survivors had osteosarcoma or Ewing sarcoma of the lower extremity or pelvis and were classified by amputation status and by age at diagnosis. The median age at diagnosis was 14 years old with a median of 16 years of follow up since diagnosis. Demographic characteristics were used to analyze the rates of psychosocial outcomes.

RESULTS

Amputation status and age at diagnosis did not significantly influence any of the measured psychosocial outcomes. Education was a significant positive predictor of employment, having health insurance, and being currently in their first marriage. Male gender predicted ever being employed and female gender predicted having health insurance and marriage. When compared with siblings, amputees had significant deficits in education, employment, and health insurance.

CONCLUSIONS

Overall, no differences between amputees and nonamputees were found. However, gender and education play a prominent role. When compared with siblings, amputees in this cohort may benefit from additional supports.