INTRODUCTION
Secondary thrombocytosis, also known as reactive thrombocytosis defined
as an abnormally high platelet count due to underlying events, disease,
or the use of certain medications. Secondary thrombocytosis is the more
common type and is usually identified in routine laboratory results.
Among individuals with thrombocytosis, 80% to 90% are known to have
secondary thrombocytosis .(1)
Reactive causes of thrombocytosis include transient processes such as
acute blood loss, acute infection, or sustained forms of reactive
thrombocytosis including iron deficiency, asplenia, cancer, chronic
inflammatory, or infectious diseases. Secondary thrombocytosis (reactive
thrombocytosis) is a laboratory anomaly that resolves when the
underlying causative condition is addressed. (2) In
most cases, the symptoms are due to an underlying disorder and not the
thrombocytosis itself. Extreme thrombocytosis may rarely result in
thrombotic events such as acute myocardial infarction, mesenteric vein
thrombosis, and pulmonary embolism. (3)