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1.
Support Care Cancer ; 32(6): 390, 2024 May 29.
Article in English | MEDLINE | ID: mdl-38806697

ABSTRACT

PURPOSE: This study assesses fertility treatment outcomes in female patients who had undergone successful oocyte retrieval following cancer therapy. METHODS: Between January 2020 and December 2022, we collected fertility treatment data from six participating centres in Spain and Germany. All patients associated with this data had undergone successful oocyte retrieval following cancer treatment. RESULTS: Women had most frequently been diagnosed with a haematological (41.9%), breast (22.6%) or gynaecological malignancy (12.9%); two thirds (67.7%) had previously received a chemotherapy, half a radiotherapy (53.3%) and 45.2% had undergone surgery. On average, 7 years (range 0-28) had passed between cancer treatment and first ovarian stimulation cycle. Forty-nine ovarian stimulation cycles had been conducted on these 31 women between 2004 and 2021 (mean age at first oocyte collection following treatment: 34.8 ± 5.7 years). On average, 7 oocytes were collected per cycle (range 0-26) and 11 were collected per patient (range 0-51). Out of the 190 oocytes collected for immediate use of artificial reproductive technique, 139 were fertilised at a rate of 73%. Live birth rate per fresh transfer was 45% (9/20); no births were reported following cryotransfer (0/10). Mean values of anti-Mullerian hormone (AMH) before stimulation declined with time since treatment; however, oocytes were successfully collected from four women with an AMH of <0.5 ng/ml, although no pregnancies were reported. Ten pregnancies were documented; 3 ended in miscarriage. Two twin and 5 single pregnancies resulted in nine live births. On average, children were carried to term. CONCLUSION: In this small cohort, oocytes were successfully collected after chemotherapy and radiotherapy, despite-in individual cases-low AMH values. Further studies are needed to enrich the database and ultimately provide appropriate counselling to female cancer patients regarding expectations and ART outcome following cancer therapy.


Subject(s)
Neoplasms , Oocyte Retrieval , Humans , Female , Retrospective Studies , Adult , Oocyte Retrieval/methods , Neoplasms/therapy , Spain , Germany , Pregnancy , Fertility Preservation/methods , Ovulation Induction/methods , Oocytes
2.
Front Psychol ; 14: 1269216, 2023.
Article in English | MEDLINE | ID: mdl-38282841

ABSTRACT

Current literature reveals no increased risk for adverse non-hereditary health outcomes in the offspring of childhood cancer survivors (CCS), yet survivors reported concerns regarding their offspring's health. To investigate how the fear of cancer development in offspring influences parental behavior related to health and prevention, survey reports from 256 European adult CCS and 256 age- and sex-matched siblings who participated in a multicenter study on offspring health were analyzed in the present study. Analyses of covariance and chi-square tests were conducted to test for differences between CCS and siblings in outcome variables (all related to healthy parenting behavior). CCS reported higher fear levels (p = 0.044, Partial η2 = 0.01) and less alcohol consumption (p = 0.011, Phi = 0.12) and smoking (p = 0.022, Phi = 0.11) during pregnancy than siblings. In survivor families, children were breastfed less often (p < 0.001, Phi = 0.18). Partial correlation analyses showed that CCS' fear levels decreased with increasing age (r = -0.16, p = 0.014), time since oncological therapy (r = -0.19, p = 0.003), and number of children (r = -0.21, p = 0.001). Overall, due to their own experiences with cancer, many CCS harbor misperceptions regarding the health outcomes of their offspring. Although the fear decreases with increasing distance from the active disease, any fear should be taken seriously, even if unfounded, and combated through targeted educational measures.

3.
Curr Oncol ; 29(8): 5748-5762, 2022 08 15.
Article in English | MEDLINE | ID: mdl-36005191

ABSTRACT

CCS often wish to have biological children yet harbour concerns about fertility impairment, pregnancy risks and the general health risks of prospective offspring. To clarify these concerns, health outcomes in survivor offspring born following ART (n = 74, 4.5%) or after spontaneous conception (n = 1585) were assessed in our European offspring study by descriptive and bivariate analysis. Outcomes were compared to a sibling offspring cohort (n = 387) in a 4:1 matched-pair analysis (n = 1681). (i) Survivors were more likely to employ ART than their siblings (4.5% vs. 3.7%, p = 0.501). Successful pregnancies were achieved after a median of one cycle with, most commonly, intracytoplasmic sperm injection (ICSI) using non-cryopreserved oocytes/sperm. (ii) Multiple-sibling births (p < 0.001, 29.7% vs. 2.5%), low birth weight (p < 0.001; OR = 3.035, 95%-CI = 1.615−5.706), and preterm birth (p < 0.001; OR = 2.499, 95%-CI = 1.401−4.459) occurred significantly more often in survivor offspring following ART utilisation than in spontaneously conceived children. ART did not increase the prevalence of childhood cancer, congenital malformations or heart defects. (iii) These outcomes had similar prevalences in the sibling population. In our explorative study, we could not detect an influence on health outcomes when known confounders, such as multiple births, were taken into account.


Subject(s)
Cancer Survivors , Neoplasms , Premature Birth , Child , Female , Humans , Infant, Newborn , Male , Neoplasms/epidemiology , Pregnancy , Pregnancy Outcome , Premature Birth/epidemiology , Prospective Studies , Reproductive Techniques, Assisted/adverse effects , Semen
4.
Cancer Epidemiol ; 75: 102052, 2021 12.
Article in English | MEDLINE | ID: mdl-34710669

ABSTRACT

INTRODUCTION: Research on childhood cancer survivor offspring has been limited to genetic disease occurrence, malformations or non-hereditary cancers. However, previous surveys indicated that survivors harbor fears about their (prospective) children's overall health. Our Multicenter Offspring Study examined extensive health aspects in children born to survivors and their siblings providing comprehensive information to be used in patient counseling to elucidate and alleviate existing concerns. METHODS: Using a specifically designed questionnaire, childhood cancer survivors and their siblings were surveyed on their offspring's health (Supplementary material). Recruitment strategies depended on local infrastructures and standards of participating centers, including registry-based and direct approaches. Group differences were tested non-parametrically and effect sizes were calculated. RESULTS: In total, 1126 survivors reported on 1780 offspring and 271 siblings reported on 441 offspring. Response rates ranged from 32.1% (Czech Republic) to 85.0% (Austria). Respondents were more likely to be female (p = .007), older at time of survey (p < .001), diagnosed 1980-1999 (p < .001) and treated with chemotherapy (p < .001). Compared to siblings, survivors were younger at time of survey (35 years vs. 39 years, p < .001) and at first birth (29 years vs. 30 years, p < .001). Survivor and sibling offspring only differed in terms of age at survey (6.3 years vs. 8.9 years, p < .001). CONCLUSION: The Multicenter Offspring Study investigates a wide variety of health aspects in offspring born to survivors and their siblings in five European countries. Our study cohorts form a solid basis for future analyses; yet, certain limitations, due to differences in approach among participating centers, must be considered when interpreting findings.


Subject(s)
Cancer Survivors , Neoplasms , Child , Female , Humans , Male , Neoplasms/epidemiology , Prospective Studies , Siblings , Survivors
5.
Psychooncology ; 30(11): 1866-1875, 2021 11.
Article in English | MEDLINE | ID: mdl-34156134

ABSTRACT

OBJECTIVE: Rising childhood cancer survival rates have increased the importance of health-related quality of life (HRQL) assessment. While survivors show comparable HRQL to peers, concerns that cancer treatment could impact the health of prospective children were reported. No previous publications address HRQL of childhood cancer survivor offspring. METHODS: We assessed survivor offspring HRQL using the parental KINDL questionnaire. Matched-pair analysis was conducted with data from the general population (KiGGS study) using age, gender and education (1:1, n = 1206 cases). Multivariate analyses were conducted to detect the influence of parental diagnose and treatment on offspring HRQL. RESULTS: Overall, within KINDL dimensions, survivors reported comparable to higher HRQL for their children than the general population. Survivor parents reported significantly (p < 0.001) higher psychological (86.7% vs. 83.0%, Cohen's d = 0.3) and self-esteem (79.1% vs. 73.3%, Cohen's d = 0.5) well-being scores for younger children (3-6-year-olds). As time since diagnosis increased, parents reported higher well-being scores. Accordingly, recently diagnosed survivors reported significantly lower psychological well-being scores (p = 0.28; OR = 0.457; 95% CI = 0.228-0.918) for their children. With increasing age, average HRQL scores decreased in both cohorts; yet, this drop was less pronounced for survivor offspring. The biggest difference between age groups (7-10- vs. 14-17-year-olds) was found for school-specific well-being (6.2-point drop in survivor offspring vs. 18.2-point drop in KiGGS offspring). CONCLUSION: Comparable to higher parentally assessed HRQL was reported for survivor offspring compared to peers. These findings are reassuring and consistent with self-reported HRQL in childhood cancer survivors. Type of parental cancer diagnosis and treatment showed no negative impact on offspring HRQL.


Subject(s)
Cancer Survivors , Neoplasms , Cancer Survivors/psychology , Child , Germany/epidemiology , Humans , Neoplasms/psychology , Prospective Studies , Quality of Life/psychology
6.
Cancers (Basel) ; 12(6)2020 Jun 24.
Article in English | MEDLINE | ID: mdl-32599807

ABSTRACT

Intracranial Ewing sarcoma (EwS) is rare and publications on primary or metastatic intracranial EwS are minimal. The aim of this study was to describe incidence, clinical behavior, treatment, and factors associated with outcome in patients with primary intracranial EwS or patients with a primary extracranial EwS and cerebral metastases at diagnosis. We reviewed all patients with primary or with metastatic intracranial EwS at diagnosis registered in the International Clinical Trial Euro-E.W.I.N.G.99 (EE99). In total, 17 of 1435 patients (1.2%) presented with primary intracranial EwS; 3 of them had metastatic disease. Four patients (0.3%) with primary extracranial EwS presented with intracranial metastatic lesions. The 3-year event-free survival (EFS) was 64% and overall survival (OS) was 70% in patients with a primary intracranial EwS. Local control in patients with primary intracranial EwS consisted of surgery (6%), radiotherapy (RT) (18%), or both modalities (76%). Univariate analysis showed that patients < 15 years of age had significantly better outcome (EFS: 72%; OS: 76%) compared to those aged above 15 years (EFS: 13%; OS: 25%). In conclusion, primary intracranial EwS and extracranial EwS with cerebral metastases at diagnosis is rare, yet survival is comparable with local and metastatic EwS elsewhere in the body. Age and stage of disease are important prognostic factors. Besides chemotherapeutic treatment, local control with surgical resection combined with RT is recommended whenever feasible.

7.
Eur J Cancer Care (Engl) ; 29(5): e13279, 2020 Sep.
Article in English | MEDLINE | ID: mdl-32567091

ABSTRACT

OBJECTIVE: As adolescent cancer patients may suffer from infertility following treatment, fertility counselling is essential. Our aim was to explore the current situation in four European countries in terms of (I) education about the risk for infertility, (II) counselling on fertility preservation, (III) patients' knowledge on fertility, (IV) sufficiency of information and (V) uptake of cryopreservation. METHODS: In total, 113 patients (13-20 years) at 11 study centres completed a self-report questionnaire three and six months after cancer diagnosis. Multivariate logistic regression was used to estimate odds ratios (OR) with 95% confidence intervals (CI). RESULTS: As many as 80.2% of participants reported having received education about the risk for infertility prior to treatment, 73.2% recalled counselling on fertility preservation. Only 52.3% stated they felt sufficiently informed to make a decision. Inability to recall counselling on fertility preservation (OR = 0.03, CI: 0.00-0.47) and female gender (OR = 0.11, CI: 0.03-0.48) was associated with lower use of cryopreservation, whereas older age was associated with higher use. CONCLUSION: Fertility counselling was available to a relatively high proportion of patients, and it did influence the utilisation of cryopreservation. However, many patients did not feel sufficiently informed. Further improvement is needed to enable adolescent cancer patients to make an informed decision on fertility preservation.


Subject(s)
Fertility Preservation , Infertility , Neoplasms , Adolescent , Aged , Counseling , Europe , Female , Humans , Infertility/prevention & control , Neoplasms/therapy
8.
J Adolesc Young Adult Oncol ; 9(1): 55-62, 2020 02.
Article in English | MEDLINE | ID: mdl-31621493

ABSTRACT

Purpose: Within a multicenter European study, we explored fertility-related wishes, concerns, and decision-making of adolescent cancer patients and their parents. Patients and Methods: Patients and parents were each asked to complete a fertility-related questionnaire 3 months after initial diagnosis. In total, 113 of 142 (79.6%) eligible patients participated; 53.1% were male and the median age was 16 years (range 13-20 years). The questionnaire was completed by 111 parents. Univariate analyses were conducted using nonparametric methods with alpha = 5%. For multivariate analyses, binary logistic regression was conducted. Results: Both patients (86.1%) and parents (96.3%) indicated a strong desire for biological parenthood for themselves/their children. Female patients (odds ratio [OR] = 3.70; confidence interval [CI]: 1.43-9.50) and parents (OR = 2.70; CI: 1.21-6.00) were more likely to report a high fear of cancer recurrence. Patients who estimated their risk for fertility impairment being high were more likely to be concerned about their fertility (OR = 5.69; CI: 1.41-22.98). Parents who received fertility preservation information were more likely to recommend its use to their children (OR = 5.50; CI: 1.07-28.40), whereas parents of female patients were less likely to do so (OR = 0.13; CI: 0.03-0.61). Conclusions: The prospect of fertility following cancer treatment is important for adolescent cancer patients and their parents, yet it is associated with many concerns. Counseling regarding fertility preservation can be more effective when the individual needs of patients and their parents are taken into consideration.


Subject(s)
Fertility/physiology , Neoplasms/complications , Adolescent , Adult , Female , Humans , Male , Neoplasms/psychology , Parents/psychology , Surveys and Questionnaires , Young Adult
9.
Psychooncology ; 28(11): 2218-2225, 2019 11.
Article in English | MEDLINE | ID: mdl-31442341

ABSTRACT

INTRODUCTION/OBJECTIVES: Fertility preservation is a major concern for adolescent cancer patients; yet, educational gaps remain. Our intervention study examined whether specially designed educational materials regarding fertility preservation increase knowledge and empowerment of patients and parents. METHODS: Eleven paediatric-oncological centres in four European countries agreed to enrol all eligible patients and parents in a questionnaire survey at 3 and 6 months after diagnosis. Treating physicians were surveyed on their medical consultation regarding fertility. RESULTS: Educational intervention increased knowledge in both patients (n = 113 and n = 101 in the control and intervention groups, respectively) and parents (n = 111 and n = 99 in the control and intervention groups, respectively), but the difference did not achieve statistical significance (knowledge difference patients: 5.6% (t0)/13.1% (t1); parents: 6.4% (t0)/3.8% (t1)). Parents of older patients (OR = 1.3, 95%CI = 1.1-1.7) and higher educational groups (OR = 6.2, 95%CI = 2.1-18.3) in the intervention group (OR = 1.9, 95%CI = 1.03-3.7) achieved higher knowledge levels. Empowerment was significantly improved in both patients (p = 0.046, d = 0.27) and parents (p = 0.046, d = 0.48) in the intervention group. DISCUSSION/CONCLUSIONS: In our study, the use of specifically prepared flyers and brochures successfully raised the level of fertility preservation knowledge in parents of older patients as well as parents with higher educational levels. Overall, the intervention improved patient and parent empowerment. Subsequent projects will include simpler information and digital material to particularly reach out to younger and less educated individuals.


Subject(s)
Empowerment , Fertility Preservation/psychology , Health Knowledge, Attitudes, Practice , Patient Education as Topic/methods , Adolescent , Europe , Female , Fertility Preservation/methods , Humans , Male , Medical Oncology/organization & administration , Neoplasms/therapy
10.
Cancer Med ; 8(3): 1086-1094, 2019 03.
Article in English | MEDLINE | ID: mdl-30790456

ABSTRACT

BACKGROUND: Magnetic resonance imaging (MRI) is the modality of choice for local staging and response evaluation of Ewing sarcoma (EwS). Aim of this study was to determine the relevance of tumor volume response (TVR) in relation to histological response (HisRes) and survival, in order to evaluate if early modification of chemotherapy might be indicated in patients with inadequate TVR. METHODS: Three dimensional (3D)-tumor volume data at diagnosis, during early induction phase (1-3 courses of chemotherapy; n = 195) and/or late induction phase (4-6 courses; n = 175) from 241 localized patients were retrospectively analyzed. A distinction was made between adequate response (reduction ≥67%) and inadequate response (reduction <67% or progression). Correlations between TVR, HisRes, event free survival (EFS), and overall survival (OS) were analyzed using chi-square tests, log-rank tests, and the Cox-regression model. RESULTS: Early adequate TVR, noted in 41% of patients, did not correlate with EFS (P = 0.92) or OS (P = 0.38). During late induction phase 62% of patients showed an adequate TVR. EFS for patients with late adequate TVR was better (78%) than for those with inadequate late TVR (61%) (P = 0.01); OS was 80% and 69% (P = 0.26), respectively. No correlation was found between TVR and HisRes. Multivariate analysis showed that poor HisRes, pelvic location and late inadequate TVR were associated with poor outcome. CONCLUSIONS: Early inadequate TVR does not predict adverse outcome; therefore, changing the treatment to second line chemotherapy is not indicated in case of inadequate early TVR. Late adequate TVR and good HisRes correlate with better EFS; patients with late inadequate TVR might benefit from augmented therapy.


Subject(s)
Radiography , Sarcoma, Ewing/diagnosis , Sarcoma, Ewing/therapy , Adolescent , Adult , Antineoplastic Combined Chemotherapy Protocols/therapeutic use , Child , Child, Preschool , Clinical Decision-Making , Female , Humans , Infant , Magnetic Resonance Imaging , Male , Middle Aged , Neoplasm Staging , Prognosis , Sarcoma, Ewing/mortality , Treatment Outcome , Tumor Burden , Young Adult
11.
Am J Hosp Palliat Care ; 36(6): 492-499, 2019 Jun.
Article in English | MEDLINE | ID: mdl-30621437

ABSTRACT

BACKGROUND: In Germany, some units of specialized palliative care (SPC) offer a 6- to 12-month rotation for resident physicians (RPs) and fellows from different specialties. OBJECTIVE: This pilot study aimed to evaluate feasibility of assessing palliative care knowledge (PCK) and palliative care self-efficacy (PCSE) using a paper-based questionnaire. METHODS: Palliative care knowledge and PCSE were assessed by introducing a score, followed by a descriptive analysis (determination of frequency, mean, median, and range) using nonparametric tests (χ2 test, Mann-Whitney U test). RESULTS: We assessed 17 RPs following SPC rotation and 16 board-certified specialists (BCSs) who had no experience in SPC from 3 German comprehensive cancer centers. Resident physicians were predominantly enrolled in residency programs of hematology and oncology (n = 6), anesthesiology (n = 6), and psychosomatic medicine (n = 3). Resident physicians rotated between year 1 and 8 of residency. Fifteen RPs (88%) had elected this rotation and 72% preferred 12-month duration. The total PCK score of PCK was 27 (RPs) and 24 (BCSs; P = .002). Mean PCSE scores were 46 (RPs) and 39 (BCSs; P = .016). Of 71% of RPs, only 27% of BCSs knew how support of hospice service was initiated ( P = .004). Participants rated the items as comprehensible (n = 24; 73%), relevant (n = 25; 76%) and the questionnaire as adequately long (n = 23; 70%). CONCLUSION: An improved PCK and PCSE were observed in physicians who rotated through an SPC unit; this resulted in an increased tangibility of local palliative care and hospice services. The questionnaire was comprehensible, relevant in terms of content, and adequate in length for a prospective multicenter survey.


Subject(s)
Health Knowledge, Attitudes, Practice , Internship and Residency/organization & administration , Palliative Care/organization & administration , Self Efficacy , Adult , Female , Germany , Humans , Male , Middle Aged , Pilot Projects
12.
Anticancer Drugs ; 27(10): 1001-10, 2016 11.
Article in English | MEDLINE | ID: mdl-27487911

ABSTRACT

Osteosarcoma is the most common primary bone cancer in children and is a highly malignant disease, in which 25% of patients present with metastasis at diagnosis. Considerable advances in the treatment of localized disease have been achieved since the introduction of combined modality treatment, increasing the prognosis of overall survival to 70%. Yet, established therapies have only limited success in treating both metastatic disease and nonresponders to primary chemotherapy. Therefore, new therapeutic approaches are required, particularly for the control of osteosarcoma in these patient groups. Epigenetically modifying substances are a class of emerging drugs that have shown therapeutic potential in various hematological and solid cancers. We examined the cytotoxic effects of 5-azacitidine, 3-deazaneplanocin A, and suberanilohydroxamic acid (SAHA) on osteosarcoma cell lines HOS, MG-63, MNNG, and ZK-58. SAHA was the only chemical agent that exerted a strong, growth-limiting effect in all cell lines tested. The growth-limiting effect of SAHA was accompanied by features characteristic of apoptotic death. We found that cotreatment with SAHA and cisplatin showed strong synergism in all cell lines. The effect of cotreatment with SAHA and doxorubicin was cell line dependent. In the cell lines HOS, MG-63, and MNNG, the combined effect was synergistic, whereas in the cell line ZK-58, SAHA antagonized doxorubicin. The strong synergism of SAHA indicated that in combination with cisplatin, it might enable a promising add-on to current therapy regimens. However, considering the cell line-dependent effect that was found when SAHA was combined with doxorubicin, further experimentation is needed.


Subject(s)
Antineoplastic Combined Chemotherapy Protocols/pharmacology , Bone Neoplasms/drug therapy , Cisplatin/pharmacology , Doxorubicin/pharmacokinetics , Hydroxamic Acids/pharmacology , Osteosarcoma/drug therapy , Adenosine/analogs & derivatives , Adenosine/pharmacology , Azacitidine/pharmacology , Cell Growth Processes/drug effects , Cell Line, Tumor , Cisplatin/administration & dosage , Doxorubicin/administration & dosage , Drug Synergism , Histone Deacetylase Inhibitors/administration & dosage , Histone Deacetylase Inhibitors/pharmacology , Humans , Hydroxamic Acids/administration & dosage , Vorinostat
13.
Clin Sarcoma Res ; 6: 3, 2016.
Article in English | MEDLINE | ID: mdl-27315524

ABSTRACT

This report summarizes the results of the 3rd Joint ENCCA-WP7, EuroSarc, EEC, PROVABES, and EURAMOS European Bone Sarcoma Network Meeting, which was held at the Children's Cancer Research Institute in Vienna, Austria on September 24-25, 2015. The joint bone sarcoma network meetings bring together European bone sarcoma researchers to present and discuss current knowledge on bone sarcoma biology, genetics, immunology, as well as results from preclinical investigations and clinical trials, to generate novel hypotheses for collaborative biological and clinical investigations. The ultimate goal is to further improve therapy and outcome in patients with bone sarcomas.

14.
Pediatr Blood Cancer ; 63(4): 604-10, 2016 Apr.
Article in English | MEDLINE | ID: mdl-26702872

ABSTRACT

BACKGROUND: Ewing sarcoma (EWS) of the head and neck is rare. Multimodal treatment consists of chemotherapy and local treatment; however, local treatment for EWS of the head and neck is challenging. The first objective was to describe local treatment administered to the patients with localized EWS of the head and neck according to the EURO-E.W.I.N.G.99-trial, and to assess the impact on survival. The second objective was to systematically review the scientific literature available for this topic. PROCEDURE: Fifty-one patients were included. Local control consisted of surgery and/or radiotherapy (RT). Event-free survival (EFS) and overall survival (OS) were determined. Outcome was analyzed by comparing local treatment approaches. A Medline search was performed for EWS of the head and neck. RESULTS: Eighty-six percent of patients had localized disease. Most common primary sites included the skull (45%), maxilla (14%), and mandible (12%). Three-year EFS was 74% and 3-year OS was 87% for patients with localized disease. EFS was 40% for patients >15 years compared to 81% for patients <15 years. Local control consisted of surgery (S; 33%), RT (18%), or S + RT (45%). Related 3-year EFS was 81% (S), 80% (RT), and 72% (S + RT); 3-year OS was 80%, 76%, and 81%, respectively. CONCLUSIONS: In patients with EWS of the head and neck, age, and stage are important prognostic factors. Although not statistically significant, large tumor volume seems to be a negative prognostic factor. No difference in EFS and OS could be found when comparing patients treated with surgery, RT, or combined surgery and RT.


Subject(s)
Bone Neoplasms/therapy , Combined Modality Therapy/methods , Head and Neck Neoplasms/therapy , Sarcoma, Ewing/therapy , Adolescent , Adult , Aged , Antineoplastic Combined Chemotherapy Protocols , Bone Neoplasms/mortality , Bone Neoplasms/pathology , Child , Child, Preschool , Disease-Free Survival , Female , Head and Neck Neoplasms/mortality , Head and Neck Neoplasms/pathology , Humans , Infant , Male , Middle Aged , Neoplasm Staging , Orthopedic Procedures , Proportional Hazards Models , Radiotherapy , Radiotherapy, Adjuvant/methods , Risk Factors , Sarcoma, Ewing/mortality , Sarcoma, Ewing/pathology , Treatment Outcome , Young Adult
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