Medical and neurocognitive late effects among survivors of childhood central nervous system tumors

The use of bone age for bone mineral density interpretation in a cohort of pediatric brain tumor patients

BACKGROUND

Skeletal bone accretion occurs throughout childhood. The integrity of this process can influence future adult bone health and the risk of osteoporosis. Although surveillance of children who are at risk of poor bone accretion is important, the most appropriate method to monitor childhood bone health has not been established. Previous investigators have proposed using bone age (BA) rather than chronological age (CA) when interpreting bone mineral density (BMD) values in children.

OBJECTIVE

To investigate the value of BA assessment for BMD measurement in a cohort of children at risk of poor accretion.

MATERIALS AND METHODS

A cohort of 163 children with brain tumors who completed both a BMD assessment (quantitative computed tomography, QCT) and who had a BA within a 6-month interval were identified. The difference in BMD Z-scores determined by CA and BA was determined. The impact of salient clinical features was assessed.

RESULTS

No significant difference between CA and BA Z-scores was detected in the overall cohort (P = 0.056). However, the scores in 18 children (all boys between the ages of 11 years and 15 years) were statistically determined to be outliers from the values in the rest of the cohort.

CONCLUSION

Interpretation of BMD with BA measurement might be appropriate and affect treatment decisions in peripubertal males.

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.

[Long-term care of young adults surviving childhood cancer - where do we go?]

METHODS

Between January 1990 and November 2006, 65 consecutive childhood cancer survivors entered a prospective follow-up study to evaluate the frequency and severity of tumor- and/or therapy-related long-term sequelae. Their median age at diagnosis was 9.7 years, median actual age is 25.1 years, and median duration of follow-up is 14.8 years.

RESULTS

Nine patients (13.9%) were completely free from late effects, whereas 31/65 patients (47.6%) had only minimal late effects without need of medical support and 25/65 patients (38.5%) had severe late effects requiring long-term medical care. The most frequent late effects were endocrine deficits, musculosceletal problems, neurologic problems, chronic hepatitis and hearing loss. Currently, a network of local adult care providers is being established in order to enable a smooth and competent referral from pediatric hemato-oncology to adult medicine.

CONCLUSIONS

Two thirds of former childhood cancer patients are able to return to everyday life without any impairment. However, one third is suffering from considerable morbidity requiring long-term medical care. Transition models from pediatric hemato-oncology to adult health care providers are urgently needed.

What is the best adjuvant treatment for very young patients with medulloblastoma?

The standard treatment for medulloblastoma is surgery followed by adjuvant chemotherapy and external beam radiotherapy to the craniospinal axis and posterior fossa. However, in very young children, craniospinal irradiation has a more significant detrimental effect in terms of neurocognitive function and growth. This article reviews the different strategies used for very young patients with medulloblastoma.

The natural history of thyroid function abnormalities after treatment for childhood cancer

The aim of the study was to find out which of childhood cancer survivors are at higher risk of thyroid dysfunction, and the timeframe for its development. The consequences of different treatments, particularly chemotherapy, were of interest. Follow-up data for 291 patients from a cohort of 360 patients were available and analysed in this retrospective study. Impaired thyroid function occurred in 71/291 (24%) patients: brain tumours 30/65 (46%), Hodgkin's disease (HD) 10/21 (48%), leukaemia/non Hodgkin's lymphoma (NHL) 19/140 (14%) and others 12/65 (18%). Patients with brain tumours had a higher hazard ratio (HR) over leukaemia/NHL (HR 7.47) but not over HD (HR 1.57). These patients also developed thyroid hypofunction earlier than patients with HD or leukaemia/NHL. Age at diagnosis did not have an effect on the occurrence or timeframe of development of thyroid hypofunction. Radiotherapy (HR 4.68) and radiotherapy combined with chemotherapy (HR 2.90) were associated with a higher risk than chemotherapy alone. Chemotherapy added to radiotherapy tended to increase risk (HR 2.42 95% confidence interval (CI) 1.00-5.87). Craniospinal irradiation did not differ significantly from total body irradiation (TBI) (HR 1.09 95%CI 0.25-4.76) or direct thyroid irradiation (HR 0.81 95%CI 0.32-2.06), but cranial irradiation (CIR) (HR 0.18 95%CI 0.08-0.38) was less harmful to thyroid function. Girls were more prone to effects of irradiation (HR 2.10 95%CI 1.15-3.82). All treatments, excluding surgery, predispose to thyroid dysfunction. Suggestions for follow-up of thyroid function are made.

Health behaviours in childhood cancer survivors: a systematic review

AIM

To review (1) prevalence and predictors of risk behaviours especially smoking and (2) values of interventions to reduce risk behaviours in childhood cancer survivors.

METHOD

A systematic search of four databases (OVID Medline (1966 to May week 2, 2006), CINAHL, EMBASE, and Pubmed (US Library of Medicine and National Institute of Health)) for articles published between January 1990 and May 2006.

RESULTS

Twenty-three eligible articles. Incidence of risk behaviours are comparable with, or lower than the general population and controls. Socio-demographic (age, socio-economic status, diagnosis, ethnic group) and psychological variables (perceived vulnerability) predict risk behaviour. Improved knowledge and awareness of vulnerability have been found after interventions, but no changes in health behaviours.

CONCLUSION

This review illustrates an optimistic picture of low participation in substance use amongst survivors, although based mainly on smoking. However, smoking might not be the major problem for survivors and attention must also be directed to other health behaviours including exercise and healthy diet.

Childhood central nervous system tumours – incidence and survival in Europe (1978–1997): Report from Automated Childhood Cancer Information System project

This paper describes the incidence and survival of childhood central nervous system (CNS) tumours in Europe for the period 1978-1997. A total of 19,531 cases, aged 0-14 years, from the ACCIS database were analysed by five regions: the British Isles, East, North, South, and West. Overall age-standardised incidence rate (ASR) of CNS tumours in Europe (1988-1997) was 29.9 per million, with the highest rates in the North. Astrocytoma (ASR=11.8), primitive neuroectodermal tumours (PNET) (ASR=6.5) and ependymoma (ASR=3.4) were the most frequent types. Incidence increased significantly during 1978-1997, on average by 1.7% per year. Diagnostic methods may partially explain incidence rates and trends, although a role of variations in risk factors cannot be excluded. Overall 5-year survival was 64% and varied between 72% in the North and 53% in the East. PNET had the poorest prognosis (49%) and astrocytoma the best (75%). Survival has improved by 29% since late 1970s. The positive trends were seen in all regions, although the interregional differences persisted, as a reflection of the different healthcare systems.

Health-Related Quality of Life Among Child and Adolescent Survivors of Childhood Cancer

Purpose

The main objective was to compare parent-reported health-related quality of life (HRQL) of child and adolescent survivors of childhood cancer to that of controls who had no history of cancer.

Methods

We assessed HRQL of 800 child and adolescent survivors younger than 16 years and 923 randomly selected, age- and sex-matched controls from the general population in a national multicenter retrospective cohort study using the Child Health Questionnaire parent report. Participation was 69% among survivors and 57% among controls.

Results

Survivors had means that were consistently lower than controls on the HRQL physical summary (PH; 49.9 v 55.3; P <.005), psychosocial summary (PS; 49.4 v 52.6; P < .005), and all but one of the eight subscale scores. Clinically important survivor-control differences in means on PH were found for survivors of CNS tumors, bone tumors, lymphoma, leukemia, soft tissue sarcoma and Wilms' tumor (differences: −8.7, −7.0, −6.3, −5.4, −4.4, −3.8/100, respectively); on PS, survivors of CNS tumors were most compromised (−6.1/100). Survivor-control differences in both PH and PS were also large for survivors treated with radiation only (−5.8 and −11.9/100, respectively), or radiation combined with surgery (−6.6 and −5.9/100, respectively), or radiation combined with both surgery and chemotherapy (−7.8 and −5.1/100, respectively). Cranial radiation was associated with the most compromised HRQL.

Conclusion

According to parents, HRQL for survivors was somewhat poorer, overall, than for controls. Survivors of CNS tumors, lymphoma, and leukemia and those patients treated with cranial radiation were reported to have poorest HRQL. These findings support development of guidelines for levels of follow-up care for particular groups of survivors.

Evaluation of health status and health-related quality of life in a cohort of Italian children following treatment for a primary brain tumor

BACKGROUND

This study is a pilot experience aiming to investigate the compliance of an institutional cohort of Italian children treated for a malignant disease and their families in completing the health utilities index2, (HUI2) and the effectiveness of this measured in terms of their health status (HS) and health-related quality of life (HRQL). It specifically, it aimed to compare the HS and the HRQL, as expressed by the HUI2 global utility score, in cohorts of patients who had brain tumors, extra-cerebral solid tumors, or leukemia/lymphoma.

PROCEDURE

Fifty survivors of brain tumors, between 8 and 30 years at the time of the assessment ("self") and/or their parents ("proxy"), attending the Pediatric Oncology Out Patient clinic of Padua, Italy, completed the HUI2 questionnaire. Eighty-nine children with acute leukemia/lymphoma and 74 with extra-cerebral solid tumors and/or their parents were also assessed.

RESULTS

The mean "self" and "proxy" HUI2 global utility scores in the brain tumor patients were 0.87 and 0.84, respectively, while in the cohorts of children with other solid tumors and leukemia/lymphoma, there were 0.94, 0.91, 0.96, and 0.92, respectively. The differences between the HUI2 global utility scores in the "self" and "proxy" assessment within each cohort of children were not statistically significant. In decreasing order of frequency, the attributes affected most commonly were: "emotion," "pain," "sensation," and "cognition" both by "self" and "proxy" assessment.

CONCLUSIONS

In this Italian population of childhood cancer survivors the HUI2 questionnaire proved to be a user-friendly tool, which provided information regarding HS and HRQL. A larger cohort of cancer children is needed to confirm the efficacy of the HUI2 questionnaire in distinguishing groups of children on this basis by disease category.

Educational and social late effects of childhood cancer and related clinical, personal, and familial characteristics

BACKGROUND

The objectives of this study were to compare educational and social outcomes for young survivors of childhood cancer with a population control group of individuals who were never diagnosed with cancer and to identify risk and protective factors for these outcomes.

METHODS

In this multicenter, Canadian, retrospective cohort study, 800 survivors age 17 years or younger were matched by age and gender with a group of 923 control participants. Using a mailed survey that was completed by parents, educational outcomes were assessed with questions about the child's enrollment in disability or special-education programs, repeating a grade, and academic or other school problems. Using friendships was the measure of social outcomes.

RESULTS

Based on parental reports, significantly more survivors than controls repeated a grade (21% vs. 9%), attended learning-disability (19% vs. 7%) or special-education programs (20% vs. 8%), had educational or other school problems (46% vs. 23%), had no close friends (19% vs. 8%), and were less likely to use friends as confidants (58% vs. 67%). Survivors of central nervous system (CNS) tumors reportedly were more likely than controls to have educational problems and no close friends, followed by survivors of leukemia, and survivors of neuroblastoma. Among survivors, cranial radiation increased the likelihood of having educational difficulties and having no close friends compared with survivors who did not receive cranial radiation. Survivors who reportedly had high self-esteem and whose parents had postsecondary education had fewer educational and social problems.

CONCLUSIONS

Children and adolescents who survived cancer, particularly those who had CNS tumors, leukemia, and neuroblastoma, required close monitoring for early educational and social difficulties, and such children should be offered educational rehabilitation and social skills training to maximize their academic and social success.

Adult growth hormone replacement therapy and neuroimaging surveillance in brain tumour survivors

OBJECTIVE

Systematic collections of neuroimaging data are nonexistent in brain tumour survivors treated with adult growth hormone replacement therapy (AGHRT). We present our surveillance data.

DESIGN

In 1993, our unit implemented a policy of performing brain scans on every brain tumour survivor before starting AGHRT, with repeat neuroimaging at least once after 12-18 months' treatment. Reports for baseline scans and most recent scans were analysed for this retrospective study.

PATIENTS

All brain tumour survivors who received AGHRT (60 patients) were included in the analysis.

MEASUREMENTS

Evidence and extent of residual tumour, tumour progression, tumour recurrence, and secondary neoplasms (SN) on baseline scan and latest follow-up scan.

RESULTS

All patients had baseline scans performed. Follow-up scans were available in 41/45 (91%) patients who received AGHRT for more than 1 year (mean duration +/- SD of GHRT was 6.7 +/- 3.6 years). Sixteen patients had residual tumours, and SNs (all meningiomas) were demonstrated in three patients on baseline scans. Appearances remained stable in 34 (83%) patients during follow-up (extending to 17.4 +/- 8.3 years after tumour diagnosis). Of the 16 residual primary tumours, an incurable ependymoma continued to grow, and one meningioma progressed slightly in size over 7.7 years. Follow-up scans also revealed continued growth of the SNs detected at baseline, and five additional meningiomas (two in patients with a previous SN, confirming an excess risk in this subgroup, P = 0.02). All SNs occurred on average 22.8 (range 17-37) years after radiotherapy.

CONCLUSIONS

Our data do not suggest an increased rate of recurrence or progression of childhood brain tumours during AGHRT. Nonetheless, vigilance and long-term surveillance are needed in these patients in order to detect and monitor SNs, in particular in patients with a previous history of a SN. We endorse a proactive neuroimaging policy, preferably as part of a larger, controlled trial in the future.

Parent proxy-reported health-related quality of life and fatigue in pediatric patients diagnosed with brain tumors and acute lymphoblastic leukemia

BACKGROUND

Pediatric patients with brain tumors (BT) are often excluded from health-related quality of life (HRQOL) studies even though they experience more severe disease and treatment-related sequelae than children with other types of cancer. Parent proxy assessments of HRQOL allow for greater inclusion of children who are developmentally immature, physically ill, or cognitively impaired.

METHODS

Parents of children ages 2-18 years who were diagnosed at Childrens Hospital Los Angeles and Children's Hospital San Diego with BT (n = 86) or acute lymphoblastic leukemia (ALL; n = 170) evaluated their children's HRQOL over the previous week using the parent-proxy versions of the Pediatric Quality of Life Inventory (PedsQL) 4.0 Generic Core scales, the PedsQL 3.0 Acute Cancer Module, and the PedsQL Multidimensional Fatigue scales. Multiple regression analyses were used to determine the independent effect of the child's diagnosis on HRQOL. Separate analyses were conducted for patients receiving treatment, patients who had not received treatment for < 12 months, and patients who had not received treatment for > or = 12 months.

RESULTS

Patients with BT exhibited more problems than patients with ALL in the physical, social, psychosocial, school, cognitive, and fatigue domains of HRQOL. The Core Physical Health, Core Psychosocial Health, and Fatigue Total scores for patients with BT demonstrated peak improvements for children who had not received treatment for < 12 months and sharp declines for children who had not received treatment for > or = 12 months. The Core Physical Health and Fatigue Total scores for patients with ALL were highest (better HRQOL) for those who had not received treatment for > or = 12 months.

CONCLUSIONS

Pediatric patients and survivors of BT experienced more fatigue and HRQOL problems than patients with ALL, and HRQOL differed by treatment status.

Psychological outcomes in long-term survivors of childhood brain cancer: a report from the childhood cancer survivor study

PURPOSE

To evaluate and compare psychological outcomes in long-term survivors of pediatric brain cancer and siblings of childhood cancer survivors, and to identify significant correlates of psychological distress.

METHODS

One thousand one hundred one adult survivors of childhood brain cancer and 2,817 siblings completed a long-term follow-up questionnaire allowing assessment of symptoms associated with depression, somatization, and anxiety, as well as demographic, health, and medical information.

RESULTS

A large majority of siblings and survivors report few, if any, symptoms of psychological distress. The prevalence of distress approximating clinically significant levels for both survivors (11%) and siblings (5%) reflects rates found in the general population. Yet when accounting for significant sociodemographic, socioeconomic, and health-status variables, survivors of childhood brain cancer, in the aggregate, appear to report significantly higher global distress and depression scores than do siblings. As in the general population, higher levels of distress among survivors and siblings were associated with female sex, low household income, lower educational attainment, being unmarried, not being employed in the past 12 months, and poor physical health status. No diagnostic or treatment-related variables were directly and significantly associated with increases in distress symptoms for survivors of childhood brain cancer.

CONCLUSION

Cancer treatment does not appear to contribute directly to increased psychological distress. Instead, distress appears to be associated with diminished social functioning that may be related to cancer type or treatment. Implementation and evaluation of supportive interventions that enhance survivors' social and vocational skills should be considered.

Final height and body mass index among adult survivors of childhood brain cancer: childhood cancer survivor study

The objectives of this study were 1) to compare final height and body mass index (BMI) between adult survivors of childhood brain cancer and age- and sex-matched population norms, 2) to quantify the effects of treatment- and cancer-related factors on the risk of final height below the 10th percentile (adult short stature) or having a BMI of 30 kg/m(2) or more (obesity). Treatment records were abstracted and surveys completed by 921 adults aged 20-45 yr who were treated for brain cancer as children and were participants in the multicenter Childhood Cancer Survivor Study. Nearly 40% of childhood brain cancer survivors were below the 10th percentile for height. The strongest risk factors for adult short stature were young age at diagnosis and radiation treatment involving the hypothalamic-pituitary axis (HPA). The multivariate odds ratio for adult short stature among those 4 yr of age or younger at diagnosis, relative to ages 10-20 yr, was 5.67 (95% confidence interval, 3.6-8.9). HPA radiation exposure increased the risk of adult short stature in a dose-response fashion (trend test, P < 0.0001). Adjuvant chemotherapy was not an independent risk factor for adult short stature. BMI distribution in survivors did not differ appreciably from that of population norms; however, in females, young age at diagnosis and HPA radiation dose (trend test, P < 0.001) were associated with risk of obesity. Except for patients treated with surgery only, survivors of childhood brain cancer are at very high risk for adult short stature, and this risk increases with radiation dose involving the HPA. We did not find a corresponding elevated risk for obesity.

Long-term neurologic and neurosensory sequelae in adult survivors of a childhood brain tumor: childhood cancer survivor study

PURPOSE

To describe the neurologic and neurosensory deficits in children with brain tumors (BTs), compare incidence of these deficits with that of a sibling control group, and evaluate the factors associated with the development of these deficits.

PATIENTS AND METHODS

Detailed questionnaires were completed on 1,607 patients diagnosed between 1970 and 1986 with a primary CNS tumor. Neurosensory and neurologic dysfunctions were assessed and results compared with those of a sibling control group. Medical records on all patients were abstracted, including radiotherapy dose and volume.

RESULTS

Seventeen percent of patients developed neurosensory impairment. Relative to the sibling comparison group, patients surviving BTs were at elevated risk for hearing impairments (relative risk [RR], 17.3; P = <.0001), legal blindness in one or both eyes (RR, 14.8; P = <.0001), cataracts (RR, 11.9; P = <.0001), and double vision (RR, 8.8; P = <.0001). Radiation exposure greater than 50 Gy to the posterior fossa was associated with a higher likelihood of developing any hearing impairment. Coordination and motor control problems were reported in 49% and 26%, respectively, of survivors. Children receiving at least 50 Gy to the frontal brain regions had a moderately elevated risk for motor problems (RR, 2.0; P <.05). Seizure disorders were reported in 25% of patients, including 6.5% who had a late first occurrence. Radiation dose of 30 Gy or more to any cortical segment of the brain was associated with a two-fold elevated risk for a late seizure disorder.

CONCLUSION

Children surviving BTs are at significant risk for both early and late neurologic or neurosensory sequelae. These sequelae need to be prospectively monitored.

Endocrine and cardiovascular late effects among adult survivors of childhood brain tumors: Childhood Cancer Survivor Study

BACKGROUND

Survivors of childhood brain tumors (CBTs) are at high risk for a variety of late adverse effects. Most research on long-term effects of CBTs has been comprised of single-institution case series without comparison groups. Research on CBT late effects often is focused on neurologic and sensory outcomes, with less emphasis on other potential targets such as the endocrine and circulatory systems. The current study was conducted to contrast the incidence of endocrine and cardiovascular conditions among CBT survivors as a function of treatment and to determine the risk of occurrence of these conditions relative to a sibling comparison group.

METHODS

As part of the Childhood Cancer Survivor Study (CCSS), treatment data were collected from medical records and self-reported late effects were ascertained from a survey questionnaire of 1,607 CBT patients who survived their disease for 5 or more years. For comparison purposes, questionnaire data were also collected from 3418 randomly selected siblings of participants in CCSS.

RESULTS

One or more endocrine conditions were reported by 43% of CBT survivors. Compared with siblings, CBT survivors had a significantly increased risk of late-onset (>/= 5 years postdiagnosis) hypothyroidism (relative risk [RR] = 14.3; 95% confidence interval [95% CI] 9.7-21.0), growth hormone deficiency (RR = 277.8; 95% CI 111.1-694.9), the need for medications to induce puberty (RR = 86.1; 95% CI 31.1-238.2), and osteoporosis (RR = 24.7; 95% CI 9.9-61.4). One or more cardiovascular conditions were reported by 18% of CBT survivors, with an elevated late-onset risk for stroke (RR = 42.8; 95% CI 16.7-109.8), blood clots (RR = 5.7; 95% CI 3.2-10.0), and angina-like symptoms (RR = 2.0; 95% CI 1.5-2.7). Very few late effects were evident among those treated with surgery only, but risks were consistently elevated for those treated with radiation and surgery, and higher still for those who also received adjuvant chemotherapy.

CONCLUSIONS

Childhood brain tumor survivors are at a significantly increased risk for several adverse endocrine and cardiovascular late effects, particularly if they were treated with radiation and chemotherapy. Lifetime medical surveillance and follow-up for potential toxicities are necessary because treatment-related complications may occur many years after therapy.