[The May-Hegglin anomaly]

The paper presents a patient J.S., aged 2 1/2 years, with thrombocytopenia, presence of giant thrombocytes and basophile inclusions in the granulocytes. The same lesions were found in the child's father, followed by increased tendency to bleeding also confirmed in other four family members. Familiar character of the disease and morphologic anomaly of thrombocytes and leucocytes were the basis in passing the diagnosis of May-Hegglin anomaly. The specific features of the case are the child's age and the appearance of hemorrhagic syndrome in infancy.