Platelet satellitism is an infrequent phenomenon of platelet adhesion to leucocytes. Twelve-month-old patient was hospitalized because of bronchopneumonia. In peripheral blood smear prepared from EDTA-anticoagulated blood sample taken from this patient platelet satellitism was observed. As time went by, a gradual, small decrease of platelet count was observed. Cytometric analysis showed the following proportions of platelet aggregates: with granulocytes--88,7%, with monocytes--5,0%, with lymphocytes--17,0%. In spite of using modern hematological analyzers still microscopic assessment of peripheral blood sample is necessary. Microscopic examination of blood smear is necessary not only to assess erythrocytes and leucocytes systems but also blood platelets.
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