Abstract
We report a case of acute myeloblastic leukaemia (AML), FAB type M2, with karyotype t(8;21)(q22;q22), who at the time of relapse showed marked eosinophilia of the bone marrow. Karyotype analysis showed the appearance of an additional clonet(8;21)(q22;q22), t(12;20)(q24;q11). To the best of our knowledge, marked eosinophilia has not been reported in association with this particular chromosomal translocation.