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Event-free survival is depicted in relationship to the presence of cytogenetic abnormalities (CA) in either randomly sampled (RS) bone marrow or focal lesion (FL) sites recognized on magnetic resonance imaging (MRI) examination. The worst outcome was observed in the 75 patients exhibiting CA in both RS and FL sites (RS+/FL+), whereas the other 3 cohorts with RS−/FL+, RS−/FL− and RS+/FL− had comparable outcomes.
