MECOM and acute myeloid leukemia: In this study, 17 acute myeloid leukemia (AML) patients were identified to pose a pericentric inv(3) aberration with breakpoints at 3p23 (n = 11), 3p25 (n = 3), 3p21 (n = 2) and 3p13 (n = 1) on 3p and 3q26.2 on 3q, leading to MECOM rearrangement (MECOM-R).