Isochromosomes in childhood acute lymphoblastic leukemia: a collaborative study of 83 cases.

Abstract:

:Cytogenetic analysis of leukemic cells from 2,805 children with newly diagnosed acute lymphoblastic leukemia (ALL) identified 83 cases (3%) that had a stemline with at least one isochromosome. The i(9q) was present in 28 (1%), the i(17q) in 23 (0.8%), and the i(7q) in 23 (0.8%). Other isochromosomes--i(21q), i(6p), i(1q), i(8q), or i(Xq)--were found in only 12 cases (0.4%). The isochromosome cases were more likely than were other ALL cases to have a pre-B immunophenotype (38% v 25%, P = .02) and leukemic cell hyperdiploidy greater than 50 (37% v 24%, P = .02); five cases had both features. The i(9q) was associated with age greater than 10 years (P less than .05) and the pre-B immunophenotype (P = .05); both the i(17q) and i(7q) had high frequencies of hyperdiploidy greater than 50 (P less than .0001 and P = .05, respectively). The t(1;19)(q23;p13) was a common feature (23%) in cases with the i(9q), i(7q), i(6p), or i(1q). These findings establish the i(9q), i(17q), and i(7q) as nonrandom chromosomal abnormalities in ALL. The prognostic significance of the presence of isochromosome(s) remains to be determined.

journal_name

Blood

journal_title

Blood

authors

Pui CH,Carroll AJ,Raimondi SC,Schell MJ,Head DR,Shuster JJ,Crist WM,Borowitz MJ,Link MP,Behm FG

subject

Has Abstract,Author List Incomplete

pub_date

1992-05-01 00:00:00

pages

2384-91

issue

9

eissn

0006-4971

issn

1528-0020

journal_volume

79

pub_type

杂志文章

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