t(1;7;22)(p13;q21;q13) is a novel 3‑way variant of t(1;22)(p13;q13) neonatal acute megakaryoblastic leukemia: A case report

Acute megakaryoblastic leukemia (AMKL) is a rare disease, occurring mostly in infants and young children. The chromosomal translocation t(1;22)(p13;q13), resulting in the RBM15-MKL1 fusion gene, is a recurrent and diagnostic translocation in infants with AMKL. The present case report describes a cas...

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Bibliographic Details
Published in:Molecular and clinical oncology 2023-03, Vol.18 (3), Article 18
Main Authors: Messiaen, Julie, Uyttebroeck, Anne, Michaux, Lucienne, Vandenberghe, Peter, Boeckx, Nancy, Jacobs, Sandra
Format: Article
Language:English
Subjects:
Anemia
Bone marrow
Case Report
Case reports
Chemotherapy
Genes
Leukemia
Medical prognosis
Monoclonal antibodies
Newborn babies
Oncology
Pregnancy
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Summary:Acute megakaryoblastic leukemia (AMKL) is a rare disease, occurring mostly in infants and young children. The chromosomal translocation t(1;22)(p13;q13), resulting in the RBM15-MKL1 fusion gene, is a recurrent and diagnostic translocation in infants with AMKL. The present case report describes a case of a newborn girl, without Down's syndrome, with congenital AMKL. At birth, the infant had hepatosplenomegaly and the peripheral blood count revealed anemia, thrombopenia and leukocytosis, with 28% blasts. Immunophenotyping demonstrated blasts positive for CD34, CD61 and CD42b. Karyotyping of these blasts (R-banding) showed a hitherto unreported chromosomal translocation, t(1;7;22)(p13;q21;q13), a 3-way variant of the t(1;22)(p13;q13) variant. Fluorescent in situ hybridization analysis confirmed the presence of the RBM15-MKL1 fusion gene.
ISSN:2049-9450
2049-9469
DOI:10.3892/mco.2023.2614