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10 slides generated from the cancer page, with a quiz from the open benchmark and speaker notes that cite the sources. Arrow keys move between slides; Print gives one slide per page.
Acute myeloid leukaemia in children carries gene fusions rather than the mutations of ageing, is treated with four or five intensive courses of chemotherapy, and cures around two thirds of children. Adding gemtuzumab ozogamicin lowered relapse in the AAML0531 trial, and the menin inhibitor revumenib is the first targeted drug approved for the KMT2A-rearranged form common in young children.
Childhood AML is defined by chromosomal rearrangements: KMT2A fusions in about a fifth, more in infants; the core-binding-factor leukaemias RUNX1::RUNX1T1 and CBFB::MYH11 in about a quarter, with the best prognosis; NUP98 fusions, CBFA2T3::GLIS2 and RBM15::MRTFA in infants and young children, with the worst; and FLT3 internal tandem duplications in about 15 percent, more in adolescents. NPM1, DNMT3A, TP53 and spliceosome mutations, which dominate adult AML, are rare. Down syndrome brings a distinct GATA1-mutated myeloid leukaemia in the first four years of life that is highly curable with reduced chemotherapy. Risk is assigned by these lesions and by flow cytometry measurable residual disease after the first course.
The backbone came from the UK MRC AML10 and AML12 trials of the 1990s, which set four intensive courses of cytarabine and anthracycline-based chemotherapy with no maintenance, and from the Berlin-Frankfurt-Münster and Nordic groups. COG AAML0531 randomised 1,022 children to gemtuzumab ozogamicin, a CD33 antibody-drug conjugate, added to the first induction and second intensification course: three-year event-free survival 53.1 percent against 46.9 percent, driven by lower relapse, with no significant overall survival gain but a clear benefit in children with high CD33 expression; gemtuzumab was approved for newly diagnosed CD33-positive AML in children from one month of age in 2020. AAML1031 found no benefit from adding bortezomib, and showed that sorafenib added to chemotherapy for FLT3-ITD disease with a high allelic ratio improved event-free survival compared with the FLT3-ITD children on AAML0531. Allogeneic transplant in first remission is reserved for high-risk genetics or persistent residual disease, and the European MyeChild01 trial has been settling gemtuzumab dosing and the choice of anthracycline.
| Setting | Approach | Guideline |
|---|---|---|
| Induction (two courses) | Cytarabine with daunorubicin or mitoxantrone and etoposide; gemtuzumab ozogamicin added to the first course for CD33-positive disease (AAML0531); MRD after course 1. | not mapped |
| Consolidation (two or three courses) | High-dose cytarabine-based courses; no maintenance. | not mapped |
| FLT3-ITD | Sorafenib added to chemotherapy for high allelic ratio (AAML1031); gilteritinib in paediatric trials. | not mapped |
| High-risk genetics or persistent residual disease | Allogeneic transplant in first remission. | not mapped |
| Relapsed or refractory | Fludarabine and cytarabine reinduction; revumenib for KMT2A-rearranged disease; gilteritinib for FLT3; venetoclax combinations in trials; transplant. | not mapped |
| Supportive care and late effects | Dexrazoxane cardioprotection with anthracyclines, transfusion and antimicrobial support, cardio-oncology follow-up. | not mapped |