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The paper describes two clinical cases of essential thrombocythemia (ET) complicated by thrombosis in parturients. ET was diagnosed only postpartum when thrombotic complications occurred. Both patients received anagrelid as first-line therapy, as well as Clexane and oral anticoagulants. It is shown that even in younger ET patients with low-risk pregnancies thrombosis and inflammation may be a stimulus to serious thrombotic complications and require special attention.

The article focuses on one of rarely occuring forms of "major eosinophilias"--hypereosinophilic syndrome (HES). Based on two observations and data from the published literature the clinical presentation of HES is described together with affection of different organs, changes in the blood and bone marrow. The article has a particular focus on differential diagnosis of HES, symptomatic and clonal eosinophilias, importance of cytogenetic investigations. The policy of managing patients presenting with the above medical problem is discussed.

With the purpose of determining the reliability of cytochemical parameters in the diagnosis of acute myeloid leukemia (AML) we carried out morphological and cytochemical studies on blast cells from 72 patients with freshly diagnosed AML. Cases were categorized according to the FAB-classification. It is recommended that a reaction to chloracetat-transferase be included into the set of cytochemical tests together with semiquantification of myeloperoxidase activity in blasts. Such an approach will, we believe, help in distinguishing between the M1/M2 and M4/M5 subvarieties of AML.