in contrast to these findings in chronic myelogenous leukemia , a small number of patients with ph1 ( + ) acute lymphoblastic leukemia ( all ) have been studied and were found to lack the bcr/abl fusion gene [ bcr ( - ) ] , but to have a new activation of abl , by recombination with an as yet undetermined region on chromosome 22 .
C0023473
chronic
C1704928
abl