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Updated: Aug 22, 2026
FISH for Pre-implantation Genetic Diagnosis
Published on: February 23, 2011
Translocation (9;22) is associated with extremely poor prognosis in intensively treated children with acute
J A Fletcher1, E A Lynch, V M Kimball
1Department of Pediatric Oncology, Dana-Farber Cancer Institute, Boston, MA.
Abstract:
The prognostic implications of t(9;22)(q34;q11) were assessed at a median follow-up of 3.5 years in 434 children receiving intensive treatment for acute lymphoblastic leukemia (ALL). Four-year event-free and overall survivals were 81% and 88%, respectively, in 419 children lacking t(9;22), but were 0% and 20%, respectively, in 15 children with t(9;22) (P less than .001). Poor outcome for children with t(9;22)-positive ALL was particularly notable because we have reported improved survival in other historically poor prognosis ALL cytogenetic categories when treated with similarly intensive therapy. We recommend that very intensive treatment approaches, including bone marrow transplantation in first remission, be considered for all children with t(9;22)-positive ALL.
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