It results in a TEL-AML1 rearrangement and is associated with a good prognosis.     ///    "Because many chromosomal alterations in leukemia are associated with distinct cell surface phenotypes, we investigated whether there was an association seen between surface marker expression and the TEL-AML1 rearrangement. "    ///    "Three of eight cases found to be rearranged by Southern hybridization but lacking the characteristic phenotype failed to show evidence of the TEL-AML1 rearrangement by polymerase chain reaction, suggesting that at least some of the discordant cases may involve partner genes other than AML1 in the TEL rearrangement. "    ///    Surface antigen phenotype can predict TEL-AML1 rearrangement in childhood B-precursor ALL: a Pediatric Oncology Group study.. 