NFIB and neoplasm: Results were available for twelve of fourteen patients; 83.3% (n = 10) of the tumors analyzed displayed MYB rearrangements at the 6q23.3 locus; 75% (n = 9) had NFIB rearrangements, and 17% (n = 2) of tumor samples did not have rearrangements of MYB or NFIB genes on FISH analysis.