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This study investigated the role of factors considered related to early stimulation of the immune system in the etiology of childhood acute leukemia. The national registry-based case-control study ESCALE was carried out in France in 2003–2004. Population controls were frequency matched to cases on age and gender. Data were obtained from structured telephone questionnaires administered to mothers. Odds ratios were estimated using unconditional regression models adjusted for potential confounders. Included were 634 acute lymphoblastic leukemia cases, 86 acute myeloblastic leukemia cases, and 1,494 controls aged ≥1 year. Negative associations were observed between acute lymphoblastic leukemia and birth order (P for trend < 0.0001), attendance at a day-care center before age 1 year (odds ratio (OR) = 0.8, 95% confidence interval (CI): 0.6, 1.1), prolonged breastfeeding (OR = 0.7, 95% CI: 0.5, 1.0), repeated early common infections (OR = 0.7, 95% CI: 0.6, 0.9), regular contact with farm animals (OR = 0.6, 95% CI: 0.5, 0.8), frequent farm visits in early life (OR = 0.4, 95% CI: 0.3, 0.6), and history of asthma (OR = 0.7, 95% CI: 0.4, 1.0) or eczema (OR = 0.7, 95% CI: 0.6, 0.9). Results support the hypothesis that repeated early infections and asthma may play a role against childhood acute leukemia. [ABSTRACT FROM PUBLISHER]

Abstract: Purpose: To examine whether three cycles of a low-intensity chemotherapy consisting of cyclophosphamide [500mg/m2 – day 1], vinblastine [6mg/m2 – days 1 and 8] and prednisolone [40mg/m2 – days 1–7] (CVP) is safe and therapeutically effective in children and adolescents with early stage nodular lymphocyte predominant Hodgkin lymphoma [nLPHL]. Patients and methods: Fifty-five children and adolescents with early stage nLPHL [median age 13years, range 4–17years] diagnosed between June 2005 and October 2010 in the UK and France are the subjects of this report. Staging investigations included conventional cross sectional as well as 18 fluro-deoxyglucose [FDG] PET imaging. Histology was confirmed as nLPHL by an expert pathology panel. Results: Of the 45 patients, who received CVP as first line treatment, 36 [80%, 95% Confidence Interval [CI]: (68; 92)] either achieved a complete remission [CR] or CR unconfirmed [CRu], the remaining nine patients achieved a partial response. All nine subsequently achieved CR with salvage chemotherapy [n =7] or radiotherapy [n =2]. Ten patients received CVP at relapse after primary treatment that consisted of surgery alone and all achieved CR. To date, only three patients have relapsed after CVP chemotherapy and all had received CVP as first line treatment at initial diagnosis. The 40-month freedom from treatment failure and overall survival for the entire cohort were 75.4% (SE±6%) and 100%, respectively. No significant early toxicity was observed. Conclusions: Our results show that CVP is an effective chemotherapy regimen in children and adolescents with early stage nLPHL that is well tolerated with minimal acute toxicity. [Copyright &y& Elsevier]

Context: There is much interest in the perinatal period in relation to childhood cancer aetiology, with most studies focussing on childhood leukaemia. This work aimed to investigate the associations between pregnancy-related and perinatal factors and childhood lymphoma., Methods: We conducted a pooled analysis of two French nationwide population-based case-control studies. Data on sociodemographic, perinatal and lifestyle factors were collected through maternal interviews. Odds ratios (OR) and 95% confidence intervals (CIs) were computed using adjusted logistic regression models, separately for non-Hodgkin lymphoma (NHL) and Hodgkin lymphoma (HL). Specific analyses also investigated Burkitt NHL and nodular sclerosis HL, two most common histological types in children., Results: We included 305 NHL, 328 HL and 2415 controls in this study. No associations were observed with gestational age, foetal growth indicators, folic acid supplementation, factors related to maternal fertility and reproductive history, or maternal smoking during pregnancy. Maternal coffee consumption during pregnancy was associated with NHL (>2 cups/day, OR = 1.5 [95% CI: 1.1-2.1]), with a dose-response relationship; while maternal alcohol consumption was associated with Burkitt NHL (OR = 1.5 [1.1-2.2]). Paternal smoking during preconception/pregnancy was associated with NHL (OR = 1.4 [1.1-1.8]). Breastfeeding (ever/never) was not significantly associated with NHL and HL, but an inverse log-linear trend was observed with the duration of breastfeeding for NHL (p = 0.04)., Conclusion: Maternal coffee and alcohol consumptions during pregnancy and paternal smoking during preconception/pregnancy might increase the risk of childhood NHL. While warranting replication, these findings could help us better understand the aetiology of childhood lymphoma., (© 2024 The Author(s). Pediatric Blood & Cancer published by Wiley Periodicals LLC.)

Neonatal screening for sickle cell disease (SCD) in France, targeted since 1995, indirectly detects newborns with sickle cell trait (SCT). Information about carrier status must be communicated to families in accordance with the 2006 National Consultative Ethics Committee recommendations; however, no national protocol for this exists. In the departments of Nord and Pas-de-Calais, the Regional Neonatal Screening Center transmits this information through a general practitioner (GP). This study aimed to assess the success rate of local practices in transmitting SCT information to parents. The secondary objectives included explaining transmission failures, evaluating post-information couple screening rates, and conducting a nationwide evaluation of SCT information dissemination. In this retrospective, multicenter study, family doctors were surveyed regarding newborns screened for SCT between January 1 and December 31, 2020, in the Nord and Pas-de-Calais departments. Among the 260 screened newborns, 197 were eligible for analysis. Results showed that 31.2% of newborns with SCT had their GP definitively sharing information with their parents. Based on this information, subsequent parental screening accounted for 13.6% of cases. The reasons cited by the GP for failing to convey information included elusive families (52.5%), unfamiliarity or refusal of the role (35%), limited SCD knowledge (25%), and ethical considerations (12.5%). This study highlights the difficulty and heterogeneity in transmitting carrier status information to parents of newborns with SCT. Our findings could serve as a foundation for the development of new methods for information transmission, given the generalization of neonatal screening for SCD by the French National Authority for Health., (© 2024 The Author(s). Pediatric Blood & Cancer published by Wiley Periodicals LLC.)

The nucleoside analogue, 2-chlorodeoxyadenosine (2CDA), was reported to be an active treatment for childhood Langerhans cell histiocytosis (LCH) without risk organ (RO-) involvement. However, we lack data on long-term effects of 2CDA treatment, including the disease reactivation rate, permanent sequelae and long-term tolerance. This study included 44 children from the French LCH registry, treated for a RO- LCH with 2CDA monotherapy (median number of six courses). The median age at the beginning of 2CDA was 3·6 years (range, 0·3-19·7 years) and the median follow-up after was 5·4 years (range, 0·6-15·1 years). Objective response to 2CDA was observed in 25 patients (56·8%), while six patients (13·6%) had stable disease and 13 patients (29·5%) exhibited progressive disease. Among patients without progression, only two experienced disease reactivation after 2CDA discontinuation. The five-year cumulative incidence of disease progression or reactivation after 2CDA therapy initiation was 34·3%. The lymphopenia reported in all cases [72% below absolute lymphocyte count (ALC) of 0·5 G/l], was addressed with appropriate prophylactic measures. Other toxicities above grade 2 were uncommon, and no second malignant neoplasm or neuropathy was reported. The five-year overall survival was 97·7%. In conclusion, we could confirm that 2CDA monotherapy was a beneficial long-term therapy for treating patients with RO- LCH. Appropriate management of induced immune deficiency is mandatory., (© 2020 British Society for Haematology and John Wiley & Sons Ltd.)

Background: Few studies have assessed the relation between maternal prenatal pesticides use and childhood lymphoma risk, some reporting a positive association with non-Hodgkin lymphoma (NHL). We investigated the association between maternal exposure to pesticides during pregnancy and childhood Hodgkin (HL) and non-Hodgkin lymphoma., Methods: We pooled data from the two French national population-based case-control studies ESCALE (2003-2004) and ESTELLE (2010-2011). Data on domestic and occupational exposures to pesticides during pregnancy were obtained through standardised maternal interviews. Logistic regression models were used to compute odds ratios (OR) and 95% confidence intervals (CI) for HL and NHL, by pesticide category adjusted for potential confounders. Analyses by histological subtypes were also performed., Results: We included 328 H L, 305 non-Hodgkin NHL and 2,415 controls. Around 40% of control mothers reported having used pesticides during index pregnancy, of whom 95% reported insecticides use. Maternal use of herbicides and fungicides occurred mostly in combination with insecticides. Insecticides use was more frequently reported in cases than controls (OR NHL  = 1.6 [95%CI 1.3-2.1], p = 0.0001; OR HL  = 1.3 [95%CI 1.0-1.7], p = 0.03). This association appeared more marked for Burkitt lymphoma and mixed cellularity classical HL. No obvious association was observed with occupational pesticides exposure during pregnancy., Conclusion: These results suggest that maternal domestic use of insecticides during pregnancy might be related to both childhood NHL and HL. Further larger studies are urgently needed., (Copyright © 2020. Published by Elsevier Ltd.)

Childhood pulmonary Langerhans cell histiocytosis (PLCH) is a rare disease. Its pulmonary histopathology, according to comprehensive clinical-radiological findings and BRAF V600E mutation status, has not yet been thoroughly documented. From the 167 childhood PLCH cases entered in the French National Histiocytosis Registry (1983-2016), we retrieved lung biopsies from a consecutive retrospective series of 17 patients, diagnosed when they were 2 weeks to 16 years old (median, 9.4 years), and report the clinical and histopathological findings herein. Histological analyses of biopsies (16 surgical and 1 postmortem) found the following features, alone or associated: Langerhans cell (LC) nodules with cavitation (9/17), cysts (14/17), fibrotic scars (2/17), peribronchiolar topographic distribution of the lesions (10/17), and accessory changes, like stretch emphysema (7/17). Those characteristics closely resemble those describing adult PLCH. However, unusual findings observed were 2 large nodules and a diffuse interstitial LC infiltrate. BRAF V600E mutation was detected in 4 of 12 samples tested, notably in the 3 with unusual features. In conclusion, childhood PLCH mostly shares the common histology features already described in adult PLCH, regardless of age. Because smoking is considered the major trigger in PLCH pathogenesis, the findings based on this series suggest other inducers of bronchiolar LC recruitment, especially in very young patients., (Copyright © 2019 Elsevier Inc. All rights reserved.)

In this retrospective study, we evaluate long-term complications in nearly all β-thalassemia-major patients who successfully received allogeneic hematopoietic stem cell transplantation in France. Ninety-nine patients were analyzed with a median age of 5.9 years at transplantation. The median duration of clinical follow up was 12 years. All conditioning regimens were myeloablative, most were based on busulfan combined with cyclophosphamide, and more than 90% of patients underwent a transplant from a matched sibling donor. After transplantation, 11% of patients developed thyroid dysfunction, 5% diabetes, and 2% heart failure. Hypogonadism was present in 56% of females and 14% of males. Female patients who went on to normal puberty after transplant were significantly younger at transplantation than those who experienced delayed puberty (median age 2.5 vs 8.7 years). Fertility was preserved in 9 of 27 females aged 20 years or older and 2 other patients became pregnant following oocyte donation. In addition to patient's age and higher serum ferritin levels at transplantation, time elapsed since transplant was significantly associated with decreased height growth in multivariate analysis. Weight growth increased after transplantation particularly in females, 36% of adults being overweight at last evaluation. A comprehensive long-term monitoring, especially of endocrine late effects, is required after hematopoietic stem cell transplantation for thalassemia., (Copyright© 2018 Ferrata Storti Foundation.)

Background: Mediastinal involvement (MI) in Langerhans cell histiocytosis (LCH) has been rarely reported. Here, we describe the clinical, radiological, and biological presentation, and the outcome of childhood LCH with MI., Method: From the French LCH register, which includes 1,423 patients aged less than 18 years, we retrieved the medical charts of patients with mediastinal enlargement detected on chest X-rays., Results: Thirty-seven patients were retrieved, including 18 males; median age of diagnosis was 0.7 years, and median follow-up time was 6.2 years. The prevalence of MI varied with the age at diagnosis, ranging from 7% below 1 year old to less than 1% at >5 years. Thirteen cases (35%) were diagnosed because of MI-related symptoms, including respiratory distress (N = 4), superior venous cava syndrome (N = 2), and/or cough and polypnea (N = 10). CT scans performed in 32 cases at diagnosis showed tracheal compression (N = 5), cava thrombosis (N = 2), and/or calcification (N = 16). All patients presented multi-system disease at LCH diagnosis, and 35/37 were initially treated with vinblastine and corticosteroids. Death occurred in five cases, due to MI (N = 1) or hematological refractory involvement (N = 4). The overall 5-year survival was 87.1%, and immunodeficiency was not detected as a sequel., Conclusions: MI in LCH mainly occurs in young children, and diagnosis was based on CT showing thymus enlargement and calcifications., (© 2013 The Authors. Pediatric Blood & Cancer Published by Wiley Periodicals, Inc.)

Background: Patients with the Shwachman-Diamond syndrome often develop hematologic complications. No risk factors for these complications have so far been identified. The aim of this study was to classify the hematologic complications occurring in patients with Shwachman-Diamond syndrome and to investigate the risk factors for these complications., Design and Methods: One hundred and two patients with Shwachman-Diamond syndrome, with a median follow-up of 11.6 years, were studied. Major hematologic complications were considered in the case of definitive severe cytopenia (i.e. anemia <7 g/dL or thrombocytopenia <20 × 10(9)/L), classified as malignant (myelodysplasia/leukemia) according to the 2008 World Health Organization classification or as non-malignant., Results: Severe cytopenia was observed in 21 patients and classified as malignant severe cytopenia (n=9), non-malignant severe cytopenia (n=9) and malignant severe cytopenia preceded by non-malignant severe cytopenia (n=3). The 20-year cumulative risk of severe cytopenia was 24.3% (95% confidence interval: 15.3%-38.5%). Young age at first symptoms (<3 months) and low hematologic parameters both at diagnosis of the disease and during the follow-up were associated with severe hematologic complications (P<0.001). Fifteen novel SBDS mutations were identified. Genotype analysis showed no discernible prognostic value. CONCLUSIONS Patients with Shwachman-Diamond syndrome with very early symptoms or cytopenia at diagnosis (even mild anemia or thrombocytopenia) should be considered at a high risk of severe hematologic complications, malignant or non-malignant. Transient severe cytopenia or an indolent cytogenetic clone had no deleterious value.

There is little data available regarding children and adolescents with Hodgkin lymphoma (HL) who relapse after combined-modality treatment, even though they have a substantial chance of cure. The purpose of this national retrospective study was to evaluate the outcome of patients with recurrent/refractory HL and determine adverse prognostic factors. From 1990 to 2006, 70 patients (median age 13·9 years) with refractory (n = 31) or first relapse (n = 39) HL were identified. Median time from end of treatment to relapse was 6 months (3-56). Relapses occurred in irradiated areas in 43/70 patients. Salvage therapy consisted of chemotherapy and 50 patients received high-dose chemotherapy with autologous stem cell transplantation. Radiotherapy was performed in 29 cases, tandem autologous transplantation in five and allograft in three. With a median follow-up of 40 months (2-140), significant prognostic factors were time to progression/relapse and response to therapy before autograft. Event-free survival and overall survival in patients with refractory disease, early relapse and late relapse were 35 ± 9%, 67 ± 11%, 76 ± 10% and 48 ± 11%, 89 ± 7% and 80 ± 10%, respectively. As progression <3 months was a major adverse prognostic factor, novel therapeutic approaches are needed for this group of patients. By contrast, patients have substantial chance of long term second remission in case of relapse >3 months., (© 2012 Blackwell Publishing Ltd.)

Objectives: Investigating the role of parental smoking and maternal alcohol consumption in the etiology of childhood hematopoietic malignancies., Methods: The national registry-based case-control study ESCALE was carried out in France over the period 2003-2004. Population controls were frequency matched with the cases on age and gender. Maternal smoking and alcohol consumption during pregnancy and paternal smoking since before conception were reported by the mothers in a structured telephone questionnaire. Odds ratios (OR) were estimated using unconditional regression models closely adjusted for potential confounders., Results: A total of 765 cases of acute leukemia (AL), 130 of Hodgkin's lymphoma (HL), 165 of non-Hodgkin's lymphoma (NHL) and 1681 controls were included. Paternal smoking was significantly associated with childhood ALL (OR = 1.4 [1.1-1.7]), AML (OR = 1.5 [1.0-2.3]), Burkitt (OR = 2.0 [1.2-3.2]), and anaplastic large cell (OR = 3.2 [1.2-9.1]) NHL. For the four diseases, the ORs significantly increased with the number of cigarettes smoked. No association with HL or with other types of NHL was observed. The associations with maternal alcohol consumption and cigarette smoking during pregnancy were less consistent., Conclusion: The results support the hypothesis that only paternal smoking, and not maternal alcohol consumption or cigarette smoking, plays a role in childhood hematopoietic malignancies.