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Somatic shift to homozygosity for a chromosomal polymorphism in a child with acute lymphoblastic leukemia

J Stamberg, A Shende and P Lanzkowsky

A 12-year-old girl with acute lymphoblastic leukemia (ALL) had two types of acquired cytogenetic abnormalities in her pretreatment peripheral blood and bone marrow: hyperdiploidy due to tetrasomy 8, 10, and 21; and, in the hyperdiploid cells, a shift from heterozygosity to homozygosity for a polymorphic variant on chromosome 15. Both abnormalities disappeared after chemotherapy, when the patient entered clinical remission. It has recently been found that shifts to homozygosity occur in retinoblastoma and Wilms' tumor. Our observation extends this finding to leukemia and indicates that such shifts may have general importance in tumorigenesis.

Volume 67, Issue 2, pp. 350-353, 02/01/1986
Copyright © 1986 by The American Society of Hematology


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  Copyright © 1986 by American Society of Hematology         Online ISSN: 1528-0020