A case of acute myelomonocytic leukemia (AMMoL; M4) with a 47,XYY kary
otype is reported. This chromosome aneuploidy was found in both bone m
arrow cells and mitogen-stimulated lymphocytes. The contribution of XY
Y chromosomal constitution in the pathogenesis of AMMoL is controversi
al. (C) Elsevier Science Inc.. 1998.