Outcome after allogeneic transplantation for adult acute myeloid leukemia patients exhibiting isolated or associated trisomy 8 chromosomal abnormality: a survey on behalf of the ALWP of the EBMT.

The aim of this multicenter retrospective analysis was to carry out a survey of overall outcomes after allo-hematopoietic SCT of AML patients harboring trisomy 8 (+8) as the sole chromosomal abnormality or associated with other abnormalities. We have identified 182 de novo AML patients who underwent allo-hematopoietic SCT between 1990 and 2007 exhibiting isolated +8 (n=136) or +8 (n=46) associated with other favorable (n=8), intermediate (n=30), high-risk (n=7) or unknown (n=1) cytogenetic abnormalities reported to the European Group of Blood and Marrow Transplantation (EBMT). With a median follow-up of 48 months, 5-year non-relapse mortality, relapse rate, leukemia-free survival and OS were 25, 30, 45 and 47%, respectively. In a multivariate analysis, leukemia-free survival rate was improved when patients were female and transplanted in CR with an HLA-identical sibling donor. Five-year leukemia-free survival was 41, 88, 57 and 21% in patients bearing isolated +8 or +8 and other cytogenetic abnormalities of good, intermediate or poor-risk, respectively. Our retrospective data show that allo-hematopoietic SCT is an effective treatment for AML patients harboring +8. The accompanying cytogenetic abnormality to +8 seems to influence outcomes of these patients.