The patients exhibited such clinical and hematological pictures, characterized by M2 and M4 with eosinophilia (FAB classification), as relatively matured leukemic cells, low neutrophil alkaline phosphatase activity, abnormal eosinophils and a high count of monocytic cells in the bone marrow.
Cytogenetic studies in a case of acute nonlymphocytic leukemia, type M4-FAB with eosinophilia, showed an acquired abnormal karyotype characterized by both a t(9;22) Philadelphia translocation and a pericentric inversion of chromosome 16, inv(16)(p13q22).
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.
A 44-year-old Japanese male having refractory anemia with excess of blasts (RAEB) preceding acute myelomonocytic leukemia (AMMoL) with dysplastic marrow eosinophilia (M4Eo in the FAB classification) is reported.
A 37-year-old Japanese male patient with acute myelomonocytic leukemia subtype M4 (according to FAB classification) associated with bone marrow eosinophilia and specific chromosome abnormalities: a pericentric inversion of chromosome 16, inv(16)(p13q22); a long arm deletion of chromosome #7, del(7)(q22q34); and a gain of chromosomes #8 and #22 is reported.
We report a case of acute myeloid leukemia with morphologic features of M7 according to the FAB (French-American-British) classification and severe eosinophilia in the peripheral blood and bone marrow at diagnosis.
All had been diagnosed as acute myeloid leukaemia (AML), 27 FAB subtype M2 and two M1, comprising 5% of all cytogenetically analysed AML during 18 yr. Auer rods were the most consistent t(8;21)-associated morphological finding and were demonstrated in 92% of the reviewed BM specimens, whereas BM eosinophilia was seen in only 24%.
The cytogenetic aberrations inv(16)(p13.1q22)/t(16;16)(p13.1;q22), frequently detected in acute myelomonocytic leukemia with eosinophilia (FAB type M4eo), are generally considered a prognostically favorable subgroup.
Acute myelomonocytic leukemia with bone marrow eosinophilia (AML-M4Eo in the French-American-British FAB] classification) is frequently associated with pericentric inversion of chromosome 16, inv(16)(p13q22).
The abnormalities were an interstitial deletion in two cases of ANLL FAB type M4 and M4 with eosinophilia, a terminal deletion in two cases of M4 and M5 type ANLL, and a translocation in an M2 ANLL.
A two-year-old girl presenting with de novo acute myelomonocytic leukemia with eosinophilia (French-American-British [FAB] classification, M4Eo) and inv(16)(p13q22), t(1;16)(q32;q22) involving the same chromosome 16 is described.