Publications by authors named "Thouvenin S"

SACHA-France (NCT04477681) is a prospective real-world study that collects clinical safety and efficacy data of novel anticancer therapies prescribed off-label or on compassionate use to patients <25 years. From March 2020 until February 2024, 640 patients with solid tumors or lymphomas were included, with 176 (28%) reported objective tumor responses. Centralized medical monitoring of local radiological/functional imaging reports by the SACHA coordinating investigator led to response modification in 45 out of 176 cases (26%), highlighting the relevance of the medical review of study data.

View Article and Find Full Text PDF

Acute leukemias of ambiguous lineage (ALAL) represent between 3 and 5% of childhood AL. This term encompasses many subtypes of AL that have been defined according to the immunophenotypic profile based on the expression of various lineage markers. This classification has been modified and enriched during the last decade thanks to the improvement of molecular biology techniques, which have led to reconsider the ontogenic proximity existing between certain forms of ALAL.

View Article and Find Full Text PDF

Genetic alterations are the cornerstone of risk stratification in B-cell precursor acute lymphoblastic leukemia (BCP-ALL), and their accurate identification is critical for optimal treatment. Most cases with ABL-class fusion are classified as high-risk yet display good responses to tyrosine kinase inhibitors (TKIs). Current clinical protocols recommend adding a TKI to chemotherapy as soon as possible, making it mandatory to rapidly identify these alterations.

View Article and Find Full Text PDF

Purpose: The study of cell-free DNA (cfDNA) enables sequential analysis of tumor cell-specific genetic alterations in patients with neuroblastoma.

Experimental Design: Eighteen patients with relapsing neuroblastoma having received lorlatinib, a third-generation ALK inhibitor, were identified (SACHA national registry and/or in the institution). cfDNA was analyzed at relapse for nine patients and sequentially for five patients (blood/bone marrow plasma) by performing whole-genome sequencing library construction followed by ALK-targeted ddPCR of the hotspot mutations [F1174L, R1275Q, and I1170N; variant allele fraction (VAF) detection limit 0.

View Article and Find Full Text PDF

Importance: Innovative anticancer therapies for children, adolescents, and young adults are regularly prescribed outside their marketing authorization or through compassionate use programs. However, no clinical data of these prescriptions is systematically collected.

Objectives: To measure the feasibility of the collection of clinical safety and efficacy data of compassionate and off-label innovative anticancer therapies, with adequate pharmacovigilance declaration to inform further use and development of these medicines.

View Article and Find Full Text PDF

Objectives: To report the long-term prophylaxis management of a child with type 3 von Willebrand disease by switching to Wilate (Octapharma AG), a plasma-derived, double virus-inactivated concentrate of freeze-dried of a 1 to 1 ratio of active Von Willebrand Factor and Factor VIII (pdVWF:pdFVIII) recently marketed as Eqwilate in France.

Methods: This is a case report of 12.6-year-old boy with congenital Type 3 VWD who had a history of frequent bleeds.

View Article and Find Full Text PDF

Ovarian function impairment and infertility are among the most frequent late effects after hematopoietic stem cell transplantation (HSCT). The aim of this study was to evaluate ovarian function, occurrence of premature ovarian insufficiency (POI), and spontaneous pregnancy in a large cohort of adult survivor women who had undergone HSCT for leukemia before puberty. We conducted a retrospective observational study in women from the national cohort L.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates how hematopoietic stem cell transplantation (HSCT) affects uterus size in women who survived childhood acute leukemia, focusing on the age at HSCT and conditioning type.
  • Conducted at 13 French university hospitals, the prospective cohort study included 88 female HSCT survivors compared to a control group, using MRI to measure uterine volume.
  • Results showed a significant reduction in uterine volume among HSCT survivors, with those receiving total body irradiation experiencing a 75.3% decrease, compared to a 43.1% decrease in those who received an alkylating agent-based regimen.
View Article and Find Full Text PDF

Organization of health care of a patient followed in pediatric oncology is not limited to cancer treatment. It includes a whole range of supportive care. Some are common to the supportive care offered in adult oncology, such as pain management and nutritional support.

View Article and Find Full Text PDF

Emicizumab is a prophylaxis for patients with severe haemophilia A with and without inhibitor. Despite weekly administration of emicizumab, coagulation states stay below normal value and cannot be assessed by standard haemostasis tests. In our two patients, we used the thrombin-generation assay (endogenous thrombin potential and Peak) to monitor the patient's clotting status.

View Article and Find Full Text PDF

Background: Disorders of sex development (DSD) are rare conditions. Although they are known to predispose to germ cell tumors (GCT), there is a paucity of information regarding the circumstances of DSD discovery.

Design/methods: All patients with DSD registered in two French pediatric GCT protocols (TGM95 and 13) were analyzed.

View Article and Find Full Text PDF

Objectives: Ketamine, an -methyl-D-aspartate receptor antagonist, is effective at relieving adult cancer pain, although there have been very few reports to date regarding its use in children and in adolescents and young adults (AYA). This study assessed the efficacy, safety and opioid-sparing effects of low doses of ketamine added to opioid analgesics to alleviate persistent cancer pain.

Methods: This prospective, multicentre, observational trial collected data regarding demographics, pain characteristics, pain score assessment within the first 48 hours of ketamine administration, tolerance and satisfaction from 38 patients aged 2-24 years prescribed with ketamine as an adjuvant antalgic for refractory cancer pain in 10 French paediatric oncology centres.

View Article and Find Full Text PDF

Objective: To evaluate the association between medical and social environmental factors and the risk of repeating a grade in childhood leukemia survivors.

Study Design: A cross-sectional study of childhood leukemia survivors, recruited through the LEA cohort (Leucémie de l'Enfant et de l'Adolescent [French Childhood Cancer Survivor Study for Leukemia]) in 2014. An adjusted logistic regression model was used to identify variables linked to repeating a grade after the diagnosis among the survivors, and the rates of repeating a grade were compared between the survivors and their siblings using a multilevel logistic regression model.

View Article and Find Full Text PDF

The prevalence of the metabolic syndrome among adults from the French LEA childhood acute leukemia survivors' cohort was prospectively evaluated considering the type of anti-leukemic treatment received, and compared with that of controls. The metabolic profile of these patients was compared with that of controls. A total of 3203 patients from a French volunteer cohort were age- and sex-matched 3:1 to 1025 leukemia survivors (in both cohorts, mean age: 24.

View Article and Find Full Text PDF

Background: The management of neuropathic pain and pain related to bone vaso-occlusive crises in sickle cell disease remains challenging in children. Lidocaine 5% patches are recommended in adults for neuropathic pain treatment, but they are not recommended in children. The purpose of this study was to assess the efficacy and tolerance of lidocaine 5% patches in pediatric inpatients.

View Article and Find Full Text PDF

Risk stratification in childhood T-cell acute lymphoblastic leukemia (T-ALL) is mainly based on minimal residual disease (MRD) quantification. Whether oncogenetic mutation profiles can improve the discrimination of MRD-defined risk categories was unknown. Two hundred and twenty FRALLE2000T-treated patients were tested retrospectively for and alterations.

View Article and Find Full Text PDF

Data on post-transplant iron overload (IO) are scarce in pediatrics. We conducted a prospective multicenter cohort study (Leucémie de l'Enfant et de l'Adolescent cohort) to determine the prevalence and risk factors of IO in 384 acute leukemia survivors transplanted during childhood. Prevalence of IO (ferritin level ⩾350 ng/mL) was 42.

View Article and Find Full Text PDF

Cardiovascular conditions are serious long-term complications of childhood acute leukemia. However, few studies have investigated the risk of metabolic syndrome, a known predictor of cardiovascular disease, in patients treated without hematopoietic stem cell transplantation. We describe the overall and age-specific prevalence, and the risk factors for metabolic syndrome and its components in the L.

View Article and Find Full Text PDF

Thyroid complications are known side effects of irradiation. However, the risk of such complications in childhood acute leukemia survivors who received either central nervous system irradiation or hematopoietic stem cell transplantation is less described. We prospectively evaluated the incidence and risk factors for thyroid dysfunction and tumors in survivors of childhood acute myeloid or lymphoid leukemia.

View Article and Find Full Text PDF
Article Synopsis
  • Severe hemophilia A is an X-linked bleeding disorder that requires immune tolerance induction (ITI) as the best treatment option when inhibitors develop.
  • Patients treated with a high-purity human factor VIII/VWF concentrate (Octanate) showed promising results after unsuccessful attempts with recombinant FVIII and plasma-derived factor VIII.
  • The study highlights the potential benefits of laboratory assays like thrombin-generation tests (TGT) and epitope mapping in managing ITI, demonstrating a decrease in inhibitor levels with Octanate therapy.
View Article and Find Full Text PDF