Pseudothrombocytosis due to microerythrocytosis: A case of beta thalassemia minor complicated with iron deficiency anemia

摘要

Thalassemia minor and iron deficiency anemia are the two major causes of microerythrocytosis. Reactive throm-bocytosis is frequently observed in iron deficiency anemia. The normal erythrocyte and thrombocyte volumes are 80-96 and 7-10 fl, respectively. In microcytic anemias like iron deficiency, the erythrocyte volume can be reduced to 30 fl, whereas in diseases like chronic myelo-proliferative disorders or May-Hegglin anomaly, the platelet volume can be enlarged up to 30-80 fl [1-3]. Volume changes in blood cells may result in erroneous analysis in the automatic blood counters. Thus, abnormal complete blood count (CBC) results should be evaluated with caution.