MECOM and acute myeloid leukemia: In the SEER database, the ICD-O-3 code is 9869/3 for acute myeloid leukemia with inv(3)(q21;q26.2) or t(3;3)(q21;q26.2), namely RPN1-EVI1, which is now known as translocation of GATA2 to MECOM31.