Prenatal origin of hyperdiploid acute lymphoblastic leukemia in identical twins
- 14 August 2003
- journal article
- case report
- Published by Springer Nature in Leukemia
- Vol. 17 (11) , 2202-2206
- https://doi.org/10.1038/sj.leu.2403101
Abstract
Studies in identical twins and with neonatal blood spots (Guthrie cards) have backtracked the origin of childhood acute leukemia and their associated chromosomal translocations to before birth. High hyperdiploidy is the most common genetic abnormality in childhood acute lymphoblastic leukemia (ALL). Evidence for an in utero initiation of this important genetic event in ALL is available from blood spots but remains limited. Twin children with hyperdiploid ALL have not hitherto been reported. We describe a pair of 2-year-old monozygotic twins with concordant B-cell precursor ALL and hyperdiploid karyotypes. One twin's leukemic cells had two rearranged TCRD alleles and one of these was a clonotypic Vδ2–Dδ3 sequence shared with leukemic cells of the other twin. The twins' leukemic cells had several different IGH VH–JH rearrangements but shared two common DH–JH ‘stem’ sequences. We conclude that ALL in these twins is likely to have originated prenatally in one fetus before spreading to the other via intraplacental anastomoses. It is likely that one or more additional postnatal genetic events was required for overt leukemogenesis.Keywords
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