Acquired platelet dysfunction associated with eosinophilia has been described mainly in indigenous Southeast Asian and East Indian children. We describe two white boys in whom this disorder developed after they had lived in Malaysia for 12 to 18 months. Acquired platelet dysfunction associated with eosinophilia should therefore be considered in children who, after a visit to this region, have easy bruising and esoinophilia.
Thirty one patients were investigated for the main complaint of easy bruising. These patients had normal platelet count with no past history of immune thrombocytopenia or systemic disorders known to predispose to bruising and a negative drug history. The evaluation of these patients included clinical review (history and physical examination) plus coagulation tests consisting of bleeding time, prothrombin time, partial thromboplastin time, thrombin time, fibrinogen level, FXIII screen and platelet functions test. Seven of the paediatric patients had acquired platelet dysfunction with eosinophilia (APDE). In 17 (94.4%) of the 18 adult patients no abnormality was demonstrated. Hence APDE was the commonest cause of easy bruising in children while the haemostatic defect contributing to easy bruising in adults remained unknown.