I T HAS BEEN ONLY RECENTLY that significant progress has been made in the study of leukocyte kinetics and cell proliferation in acute leukemia. This became possible with the introduction of tritiated thymidine (H3TdR), a labeled precursor specffic for DNA.’ With the technic of radioautography, this labeled compound has been employed in vivo to investigate the leukemic cell cycle and cell prolif...

I T HAS BEEN ONLY RECENTLY that significant progress has been made in the study of leukocyte kinetics and cell proliferation in acute leukemia. This became possible with the introduction of tritiated thymidine (H3TdR), a labeled precursor specffic for DNA.’ With the technic of radioautography, this labeled compound has been employed in vivo to investigate the leukemic cell cycle and cell prolif...

The sister chromatid exchange (SCE) frequency was studied in the leukemic cells of 12 patients, 10 with Philadelphia chromosome (Ph1)-positive chronic myelocytic leukemia (CML), 1 with Ph1-negative CML, and 1 with acute myeloblastic leukemia. Except for two patients in the blastic phase of CML, the SCE values were within the normal range [3.8 +/- 6.4 (S.D.) SCE/cell; normal is 3.3 +/- 2.2 SCE/c...

Blastic NK cell lymphoma is a rare hematolymphoid neoplasm. This report illustrates an unusual presentation of this entity, namely as a primary leukemia, but without skin lesions.

A case of chronic myelocytic leukemia is reported. He developed blastic crisis as well as myelofibrosis, simultaneously as a complication, after 1-1/2 years treatment with myeleran.

ALL: acute lymphoblastic leukemia BPDCN: blastic plasmacytoid dendritic cell neoplasm CVAD: cyclophosphamide, vincristine, doxorubicin, dexamethasone CVAD A1B: cyclophosphamide, vincristine, doxorubicin, dexamethasone alternating with methotrexate and cytarabine HSCT: hematopoietic stem cell transplantation LRT: localized radiotherapy LS-BPDCN: localized skin-limited blastic plasmacytoid dendri...

Natural killer (NK) cell malignancy is a heterogeneous disorder and rare, representing <1% of non-Hodgkin lymphomas for most of the world, except in Asia and Latin America. In Asia, especially, the incidence of NK-cell lymphomas is approximately 7%–10% of lymphomas [Au et al., 2005]. The pathogenesis of NK-cell malignancies has not yet been fully elucidated. In the 2008 World Health Organizatio...

Blastic natural killer (NK) cell lymphoma / leukemia is a rare NK cell malignancy of unknown etiology. It occurs in multiple sites and with a propensity for skin involvement. We report such a case in a 35-year-old male suffering from erythematous and purpuric papules and plaques on his face and trunk for 6 months. A biopsy specimen of the skin showed diffuse infiltration of blastlike lymphoid c...