[Use of flow cytometry in the diagnosis of acute leukemias in childhood].

The authors examined, using the method of flow cytometry, 56 children with acute lymphoblastic leukaemia. Leukaemic cells of the bone marrow aspirate and peripheral blood were examined on a FACS 440 apparatus for establishment of the diagnosis before treatment was initiated. Individual immunological subtypes were differentiated by means of a panel of monoclonal antibodies.

Syndrome of secondary polymyositis with leukemia.

A boy with neurofibromatosis suffered mumps at the age of 5. A full-blown juvenile polymyositis developed shortly afterwards. First hematological consultation was done for monocytosis in peripheral blood at the age of 7.

[Histiocytic syndromes in childhood].

The authors submit an account of the new classification of histiocytic diseases in childhood, they mention contemporary views on their aetiology, pathogenesis, advances in diagnosis and therapy. The paper is supplemented by case-histories from the authors' own practice.